Multi Theft Auto is a game engine
Open source simulation game based on Transport Tycoon Deluxe
A multi core friendly rigid body physics and collision detection lib
The Pokémon API
Arianne is an engine to develop multiplayer online games like Stendhal
LDraw™ editor for LEGO® style digital building instructions.
Data-oriented and data-driven game engine written in Rust
CoffeeMudForAI is plaform to design AI in
Scriptable GTK based Python MUD Client
Snowball deathmatch game