Hit Points

• Hit Dice: 1d8 per Tinker level
• Hit Points at 1st Level: 8 + your Constitution modifier
• Hit Points at Higher Levels: 1d8 (or 5) + your Constitution modifier per Tinker level after first

Proficiencies

• Armor: Light armor, medium armor
• Weapons: Simple weapons, firearms, hand crossbows, heavy crossbows
• Tools: Thieves' tools, tinker's tools, one type of artisan's tools of your choice

• Saving Throws: Constitution, Intelligence
• Skills: Choose two from Arcana, History, Investigation, Medicine, Nature, Perception, Sleight of Hand

Equipment

You start with the following equipment, in addition to the equipment granted by your background:

• any two simple weapons
• a pistol and 20 bullets
• (a) a studded leather armor or (b) scale mail
• tinker's tools and a dungeoneer's pack

Schematics Known

At 2nd level, you gain two schematics of your choice, choosing from the "Gadgetry Schematics" section at the end of the class's description. You learn additional schematics of your choice when you reach certain levels in this class, as shown in the Schematics Known column of the Tinker class table. You must meet all of a schematic's prerequisites to learn it.

Whenever you gain a level in this class, you can replace one of the gadgetry schematics you learned with a new one.

Gadgetry Ability

Because your schematics rely on your tinkering and innovation, you use your Intelligence whenever a schematic refers to your gadgetry ability. In addition, you use your Intelligence modifier when setting the saving throw DC for a schematic and when making an attack roll with one.

Using Schematics

With artisan's tools in hand, you can create a gadget described in one of your schematics in an an unoccupied space within 5 feet of you. This creation requires 1 hour of uninterrupted work, which can coincide with a short or long rest. These gadgets are nonmagical and remain until destroyed, but can only be used by you.

You can only use a schematic to create one gadget at a time. If you try to create a second gadget using the same schematic, the first is immediately destroyed. A gadget is also destroyed if you replace the schematic used to create it with new schematic.

Tinker Specializations

Explosives For Dummies

When you choose this specialization at 1st level, your affinity for destruction results in your discovery of explosive munitions. Whenever you finish a long rest, you can produce an explosive munition. When you do this, you choose between creating an Impact Grenade or Pressure Mine, with the effects for each listed below.

• Impact Grenades. As a bonus action, you can throw a grenade (to a point within 30 feet) or hurl it with a sling (to a point within the sling's long range). It detonates on impact, and each creature within a 10-foot radius must make a Dexterity saving throw against your Gadgetry save DC. On a failed save, affected creatures take 2d6 fire damage on a failed save and are pushed 10 feet from the center of the explosion. Creatures that succeed take half as much damage and aren't pushed.
• Pressure Mine. As a bonus action, you can set up a mine to cover a level, square area that is 10 feet on a side. There must not be a creature within the targeted area when you set up the mine. When a creature moves across the covered area, the mine detonates forcing all creatures within 5 feet of the covered area to make a Dexterity saving throw against your Gadgetry save DC. On a failed save, affected creatures take 2d8 fire damage and are knocked prone. Creatures that succeed take half as much damage and aren't knocked prone.

Creating an explosive munition in this way requires you to have tinker's tools or gunsmith's tools on your person, and any explosive munition you create with this feature lasts until it explodes or until the end of your next long rest.

When you reach certain levels in this class, you can make more potions at the end of a long rest: two at 6th level, three at 10th level, and four at 14th level. Each explosive munition can be of a different type.

Battlefield Demolition

At 6th level, you are a scholar in explosive theory. Your bombs deal twice as much damage to objects and structures and you have resistance to damage dealt by your own bombs.

In addition, you can put together improvised explosives quickly. As an action, you can expend a Cobble die to produce an explosive munition, as detailed in your Explosives For Dummies feature.

Doctorate In Destruction

Starting at 10th level, you've mastered the perfect time it takes to prime an explosive. As an action, you can cause your next explosive munition to explode unexpectedly, giving all affected creatures disadvantage on their saving throw. You can use this action only if you haven't moved during this turn, and after you use the action, your speed is 0 until the end of the current turn.

You can use this feature twice, and recover expended uses at the end of a long rest.

Master Blaster

At 14th level, you have achieved a mastery of the explosive arts.

• You can expend a Cobble die to cast the spell delayed blast fireball once without requiring material components, using your Gadgetry save DC. You must finish a long rest before you can cast it again with this feature.
• Magical barriers that can be destroyed by the Disintegrate spell (like Wall of Force, Otiluke Resilient Sphere, etc.) are also destroyed when they should take damage from one of your explosive munitions.

Spellcasting

When you choose this specialization at 1st level, you augment your martial prowess with the ability to cast spells.

Cantrips. You learn two cantrips of your choice from the mage spell list. You learn an additional wizard cantrip of your choice at 4th level and another at 10th level.

Spell Slots. The Gadgeteer Spellcasting table shows how many spell slots you have to cast your spells of 1st level and higher. To cast one of these spells, you must expend a slot of the spell's level or higher. You regain all expended spell slots when you finish a long rest.

For example, if you know the 1st-level spell shield and have a 1st-level and a 2nd-level spell slot available, you can cast shield using either slot.

Spells Known of 1st Level and Higher. You know three 1st-level mage spells of your choice.

The Spells Known column of the Gadgeteer Spellcasting table shows when you learn more mage spells of 1st level or higher. Each of these spells must be of a level for which you have spell slots. For instance, when you reach 7th level in this class, you can learn one new spell of 1st or 2nd level.

Whenever you gain a level in this class, you can replace one of the mage spells you know with another spell of your choice from the mage spell list. The new spell must be of a level for which you have spell slots.

Spellcasting Ability. Intelligence is your spellcasting ability for your mage spells, since you learn your spells through tinkering and experimentation. You use your Intelligence whenever a spell refers to your spellcasting ability. In addition, you use the same method for determining your schematics' saving throw DC and when making an attack roll, as detailed in the "Gadgetry" feature, for when you cast a mage spell that requires a saving throw or attack roll.

Spellcasting Focus. You can use a set of tinker's tools as a spellcasting focus for your mage spells.

Magical Augmentation

Also at 1st level, you learn how to augment your spells, pushing them to their limits. Whenever you cast a spell, expend a number of Cobble die to apply one of the following Augmentations to the spell.

You can use only one Augmentation option on a spell when you cast it, unless otherwise noted.

Steam Armor

Beginning when you choose this specialization at 1st level, you have built a terrific suit of mechanical armor. The suit is only operable by you, and can't function without an operator. See its game statistics in the Steam Armor stat block, which uses your proficiency bonus (PB) in several places. You determine the creature's appearance; your choice has no effect on its game statistics.

While operating the suit in combat, you control it on your turn, using its movement as your own and taking an action to use one of its actions. That action can be one in its stat block or some other action. You can be targeted by spells and attacks instead of the suit, though you have half cover while operating it, and when you are forced make a saving throw you can cause the suit to suffer the effects instead.

If the mending spell is cast on it, it regains 2d6 hit points. If it has died within the last hour, you can use your tinker's tools or smith's tools as an action to revive it, provided you are within 5 feet of it and you expend a Cobble die. The suit returns to life after 1 minute with all its hit points restored.

At the end of a long rest, you can create a new suit if you have tinker's tools or smith's tools with you. If you already have a suit from this feature, the first one is immediately destroyed. The suit is also destroyed if you die.

Cobbled Machinery

Also at 1st level, your Steam Armor is considered as a weapon, armor, tool, and a vehicle, for the purposes of benefiting from your Cobble die's effects.

Initiate Battle Systems

At 5th level, your Steam Armor can attack twice, instead of once, when you use the Mechanical Assault action on your turn.

In addition, attacks made by your suit are considered magical for the purposes of overcoming resistances and immunities.

Advanced Steam Armor

At 10th level, you have three-quarters cover when operating your Steam Armor. You also gain the following effects:

• When you hit a target with a Mechanical Assault action, you can expend a number of Cobble die, to a maximum of 3, and add the total rolled to your damage.
• As an action, you can expend a number of Cobble die, to a maximum of 3, and add the total rolled as temporary hit points for your Steam Armor.

Overcharge Battle Systems

Beginning at 14th level, you can use your action to activate a powerful attack mode for your Steam Armor. For 1 minute, the suit gains the following effects:

• The suit's operator has total cover.
• The suit gains resistance to all damage.
• The suit gains advantage on all attack rolls.
• If you are incapacitated, the suit can take any action of its choice.

You can also choose to activate this effect whenever you fall unconscious.

Once you use this feature, you can't use it again until you finish a long rest.

Alarm-O-Bot

This schematic creates a Tiny construct with 10 AC and 1 hit point. As an action, you can place the gadget within 5 feet of you and activate it. While activated, the gadget senses a 15-foot radius area centered on itself. If a creature touches or enters the gadget's sensed area, the gadget sets off an alarm audible up to 60 feet away for 1 round. When you activate this gadget, you can designate creatures that won't set off the alarm.

The gadget stays active for 8 hours, until it is destroyed or until you deactivate it as a bonus action. You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses at the end of a long rest. If the gadget is destroyed, you must create a new gadget with this schematic.

Buzzbox

This schematic creates a buzzbox, as described in chapter 4 of the Heroes Handbook.

Deepdive Helmet

This schematic creates a gadget wearable as a diving helmet. While wearing this gadget, you can breathe underwater and ignore any detrimental effects caused by deep water. As an action, you can activate a light that sheds bright light in a 15-foot cone and dim light for an additional 15 feet.

Deployable Bullet Dispenser

Prerequisite: 10th-level Tinker
This schematic creates a Small construct with 16 AC and 30 hit points. As an action, you can place the gadget within 5 feet of you and activate it.

In combat, the gadget shares your initiative count, but it takes its turn immediately after yours. It can't move or use any action on its turn, unless you command it to make an attack using your bonus action on your turn. When this gadget makes an attack, it makes a ranged attack using your Gadgetry attack modifier against a target within 120 feet, dealing piercing damage on a hit. The damage taken equals four rolls of your cobble die.

If the mending spell is cast on it, it regains 2d6 hit points. The gadget stays active for 10 minutes, until it is destroyed, or you deactivate it as an action. If the gadget is destoyed, you must create a new gadget with this schematic.

Dwarven Autominer

Prerequisite: Dwarven Engineering, 6th-level Tinker
This schematic creates a gadget capable of drilling through stone. As an action, you can activate the autominer, targeting a space filled with stone within 5 feet. It takes 1 minute to drill through 5 feet of stone.

  You can use this gadget a number of times equal to your proficiency bonus, recharging expended uses at the end of a long rest.

Dwarven Avalanche Boots

Prerequisite: Dwarven Engineering, 6th-level Tinker
This schematic creates a gadget wearable as boots. If you deal damage to a creature from falling on it while wearing this gadget, you take half as much damage as you normally would, and the creature you landed on takes twice as much than it normally would.

Dwarven Boomstick

Prerequisite: Dwarven Engineering
This schematic creates a gadget capable of firing a blast of lead. As an action, you can cause the gadget to send shrapnel in a 15-foot cone. Each creature in that area must make a Dexterity saving throw. A creature takes an amount of piercing damage on a failed save, or half as much on a successful one. The damage taken equals three rolls of your Cobble die.

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses at the end of a long rest.

Dwarven Mole Machine

Prerequisite: Dwarven Engineering, 14th-level Tinker
This schematic creates a Large vehicle with 18 AC, 50 hit points. The gadget has a burrowing speed of 30 feet, capable of burrowing through stone at half speed, and leaves a 10-foot-diameter hole in its wake. The gadget can comfortably fit 4 Medium sized creatures in it, and requires an operator to use their action each turn to move it.

If the mending spell is cast on it, it regains 2d6 hit points. If the gadget has been destroyed, you must create a new gadget with this schematic.

Dwarven Power Fists

Prerequisite: Dwarven Engineering, 6th-level Tinker
This schematic creates a gadget wearable as gloves. While wearing this gadget, you count as one size larger when determining the weight you can push, drag, or lift.

Additionally, when you wield a weapon with the throwing property, the range at which you can throw it is doubled, and the weapon deals extra damage equal to your cobble die when thrown.

Dwarven Runed Reflector

Prerequisite: Dwarven Engineering
This schematic creates a gadget wearable as a bracer. While wearing this gadget, you can cast the absorb elements spell.

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses at the end of a long rest.

Town-In-A-Box

Prerequisite: 18th-level Tinker
This schematic creates a gadget capable of quickly
expanding into a functioning town. As an action, you
can deploy the gadget within 15 feet of you, which
quickly expands over the course of 10 minutes into a
small town, covering a square area 150 feet on a side.
Any creatures in the area are harmlessly pushed to the nearest unoccupied space.

The town has up to four buildings, situated anywhere within the bounds of the town. Each building has a square base that is 30 feet on a side, and they each have one floor with 10-foot-high ceilings. You can choose to distribute
three extra floors among the buildings, each with 10-foot
high ceilings. Each building has metal exterior walls 8 inches thick.

Each of the buildings' floors can be divided into as many rooms as you like, provided each room is at least 5 feet on a side. The floors of the buildings are connected by metal ladders, have metal interior walls 4 inches thick, and interior rooms can have metal doors or open archways as you choose. The buildings are furnished and decorated as you like, and it contains sufficient means to produce food for 20 people for one year.

The walls are all made of metal that can be damaged. Each 10-foot-by-10-foot section of wall has AC 15 and 15 hit points per inch of thickness. It is immune to poison and psychic damage. Reducing a section of wall to 0 hit points destroys it and might cause connected sections to buckle and collapse at the DM’s discretion.

Once you use this gadget, you must create a new gadget with this schematic. Creating a new gadget with this schematic destroys any preexisting towns created through this schematic.

Voice Amplification Modulator

This schematic creates a gadget capable of modifying a creature's voice. You can activate this gadget to change the pitch and volume of your voice, up to three times as high or low and up to three times as loud or quiet.

Watergliding Jets

Prerequisite: 6th-level Tinker
This schematic creates a gadget wearable as boots. While wearing these boots, you can use your bonus action to activate them, allowing you to move across any liquid surface - such as water, acid, mud, snow, quicksand, or lava - as if it were harmless solid ground (crossing molten lava can still take damage from the heat).

If you activate this gadget while submerged in a liquid, the gadget carries the target to the surface of the liquid at a rate of 60 feet per round.

This gadget lasts for 1 hour after being activated, after which it cannot be used again until you finish a long rest.

World Enlarger

Prerequisite: 6th-level Tinker
This schematic creates a gadget capable of enlarging the entire world, for you alone. As an action, you can activate this gadget, causing your size to be reduced to a third in all dimensions, and your weight to be reduced to one-sixteenth of normal.

Alchemist's Stone

Prerequisites: Apothecary Specialization, 10th-level Tinker
This schematic creates a gadget capable of transmuting matter. Using this gadget, you can perform a special alchemical procedure on a material transforming it into a different material of commensurate gold value (for example, an amount of material worth 10 gold can only be transformed into another amount of material worth 10 gold). For each 10 minutes you spend performing the procedure, you can transform up to 5 cubic foot of material. After 1 hour, or until you lose your concentration (as if you were concentrating on a spell), the material reverts to its original substance.

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses on a short or long rest.

Battle Elixirs

Prerequisite: Apothecary Specialization
This schematic creates a gadget that adds to your selection of curative brews. When you roll on the Curative Brewing table, the die size of the table is increases by one size (from d4 to d6, for example), and the following options are added:

Guardian Elixirs

Prerequisites: Apothecary Specialization Tinker
This schematic creates a gadget that adds to your selection of curative brews. When you roll on the Curative Brewing table, the die size of the table is increases by one size (from d4 to d6, for example), and the following options are added:

Lethal Poisons

Prerequisite: Apothecary Specialization
This schematic creates a gadget that adds to your selection of virulent brews. When you roll on the Virulent Brewing table, the die size of the table is increases by one size (from d4 to d6, for example), and the following options are added:

Lord Walden's Oils

Prerequisites: Apothecary Specialization, 6th-level
This schematic creates a gadget that allows you to create weapon oils. When you produce a potion with your Potion Brewer feature, you can choose any of the options on the Lord Walden's Oils table instead of rolling on the Curative Brewing or Virulent Brewing table. These oils can only be used to coat a weapon, and is applied to creatures hit by a weapon coated with a weapon oil. A creature affected by these oils can choose to make a saving throw against your Gadgetry save DC, only taking the effect on a failure.

Noggenfogger's Elixir

Prerequisites: Apothecary Specialization, 6th-level
This schematic creates a gadget usable as a potion. As an action, you can drink from this gadget or allow a willing creature within 5 feet of you to drink from it. A creature that drinks from this gadget must roll a d6 and undergoes a transformation as detailed in the table below.

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses on a short or long rest.

Fusioncoil Spellguard

Prerequisite: Gadgeteer Specialization, 6th-level Tinker
This schematic creates a gadget wearable as a shield. While wearing the gadget as a shield, you have advantage on saving throws against spells and other magical effects.

Minor Recombobulator

Prerequisite: Gadgeteer Specialization, 6th-level Tinker
This schematic creates a gadget capable of restoring your own magical energy. As an action, you can activate this gadget to recover a number of spell slots with a combined level equal to half your proficiency bonus (rounded up).

Once you activate this gadget, you can't use it again until you finish a long rest.

Quantum Replicator

Prerequisite: Gadgeteer Specialization
This schematic creates a gadget that adds to your existing Magical Augmentations. You gain the following option, along with its potential malfunction.

Quantum Replicator. When you cast a spell that targets only one creature and doesn't have a range of self, you can expend a number of Cobble dice equal to the spell's level to target a second creature in range with the same spell (1 Cobble die if the spell is a cantrip). To be eligible for Quantum Replicator, a spell must be incapable of targeting more than one creature at the spell's current level.

Quantum Replicator Malfunction. The replicator targets you instead, causing you to be in two places at once. The spell is unaffected by the augmentation, but a duplicate of you is created within 5 feet of the target creature. The duplicate cannot move or take any actions and lasts until the end of your next turn, at which point it disappears. The duplicate can take damage however, and any damage it has taken is immediately transferred to you as soon as it disappears.

Radium Penetrator

Prerequisite: Gadgeteer Specialization
This schematic creates a gadget that adds to your existing Magical Augmentations. You gain the following option, along with its potential malfunction.

Radium Penetrator. When you cast a spell that requires you to make a spell attack roll or that forces a target to make a Dexterity saving throw, you can expend 1 Cobble die to ignore the effects of half- and three-quarters cover against targets of the spell.

Radium Penetrator Malfunction. As the spell is augmented, the radium penetrator releases a radioactive byproduct. Creatures within 15 feet of you, including yourself, must make a Constitution saving throw against or take 3d8 necrotic damage.

Technomagic Failsafe

Prerequisite: Gadgeteer Specialization
This schematic creates a gadget capable of protecting yourself from malfunctions. Whenever a malfunction occurs due to one of your Magical Augmentations, you can choose to ignore it.

Once you use this gadget, you can't use it again until you finish a long rest.

Temporal Suspension Field

Prerequisite: Gadgeteer Specialization
This schematic creates a gadget that adds to your existing Magical Augmentations. You gain the following option, along with its potential malfunction.

Temporal Suspension Field. When you cast a spell that has a duration of 1 minute or longer, you can expend 1 Cobble die to double its duration, to a maximum duration of 24 hours.

Temporal Suspension Field. The temporal field backfires, reversing its effects. The spell's duration is halved, to a minimum duration of 3 rounds.

Arcane Nullification Modification

Prerequisite: Steam Warrior Specialization, 14th-level Tinker
This schematic creates a gadget that modifies your Steam Armor to suppress spellcasting abilities. Creatures within 10 feet of the suit can't cast spells.

Crowd Pummeler Weapon

Prerequisite: Steam Warrior Specialization, 6th-level Tinker
This schematic creates a gadget that adds an additional attack option to your Steam Armor. Your Steam Armor gains the following action:

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses on a short or long rest. This schematic can't be learned if you already know the Sawblade Weapon schematic.

Flamespout Weapon

Prerequisite: Steam Warrior Specialization, 6th-level Tinker
This schematic creates a gadget that adds an additional attack option to your Steam Armor. Your Steam Armor gains the following action:

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses on a short or long rest.

Heavyduty Frame

Prerequisite: Steam Warrior Specialization, 10th-level Tinker
This schematic creates a gadget that allows your Steam Armor to lift heavy loads. Your suit counts as one size larger when determining its carrying capacity and the weight it can push, drag, or lift. Additionally, it can't be knocked prone or moved against your will.

This schematic can't be learned if you already know the Swift Frame schematic.

Ironplate Chassis

Prerequisite: Steam Warrior Specialization
This schematic creates a gadget a that bolsters your Steam Armor with additional protection. Your Steam Armor's armor class increases to 18.

This schematic can't be learned if you already know the Lightweight Chassis schematic.

Lightweight Chassis

Prerequisite: Steam Warrior Specialization
This schematic creates a gadget a that empowers your Steam Armor with a lighter exterior. Your Steam Armor's movement speed increases to 40 feet.

This schematic can't be learned if you already know the Ironplate Chassis schematic.

Sawblade Weapon

Prerequisite: Steam Warrior Specialization, 6th-level Tinker
This schematic creates a gadget that adds an additional attack option to your Steam Armor. Your Steam Armor gains the following action:

You can use this gadget a number of times equal to half your proficiency bonus (rounded up), recharging expended uses on a short or long rest. This schematic can't be learned if you already know the Crowd Pummeler Weapon schematic.

Self Destruct Modification

Prerequisite: Steam Warrior Specialization, 14th-level Tinker
This schematic creates a gadget that modifies your Steam Armor to explode when it is destroyed. When the suit is reduced to 0 hit points, you are ejected to an unoccupied space within 30 feet and the suit explodes. Creatures within 15 feet of the suit must make a Dexterity saving throw. Creatures take 8d6 fire damage on a failed save, or half as much on a successful once. This destroys the Steam Armor.

Skyshredder Modification

Prerequisite: Steam Warrior Specialization, 14th-level Tinker
This schematic creates a gadget that modifies your Steam Armor to allow it to fly. Your Steam Armor gains a fly speed of 20 feet, and can also hover.

Swift Frame

Prerequisite: Steam Warrior Specialization, 10th-level Tinker
This schematic creates a gadget that allows your Steam Armor to move freely. Your suit cannot be grappled or restrained, and can ignore penalties due to rough terrain.

This schematic can't be learned if you already know the Heavyduty Frame schematic.