Starting from version 9848, Nuclear Throne Together allows the players to variously extend the game through scripting in a GameMaker Language-esque scripting language.

Scripting is a very powerful mechanism. While slightly constrained in execution speed (due to being interpreted at runtime), it can be used to control noticeable portions of the game.

Scripting system is also synchronized and will work in online multiplayer sessions without any additional effort from your side, meaning that you can write and test mods with people in realtime.

General scripting topics:

• Getting started
• [Additional] language features

Custom content:

• General mods
• Custom characters
  • Player' variables
  • Custom skins
• Custom mutations
  • Mutations API
• Custom crowns
• Custom areas
• Custom weapons
  • Weapons API
• Custom projectiles
• Custom damageable objects

Scripting API' specific topics:

• Input
• Script binding (script_bind)
• File I\O

Game asset references:

• Sprites
• Sounds
• Objects