Luau

Gradually typed scripting language derived from LuaOpen source· verified Sep 2026

A language derived from Lua 5.1 with optional type checking, used for gameplay scripting in Roblox. Its language implementation is open source independently of the Roblox platform.

Official site

Reach for it when

Roblox gameplay and reusable modules
Projects embedding a sandboxed scripting language

Worth knowing

Roblox APIs belong to the platform, not the standalone language runtime. Existing Lua libraries may need adaptation to Luau and Roblox’s execution environment.

In stack playbooks

Roblox Studio + Luau

Gameplay scripts and reusable modules with optional type checking

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