OpenTTD

Written in C++ and using SDL, The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox, it simulates air pressure and velocity as well…

Terasology - open source voxel world

The main repository for the development of the evolution game Thrive.

GemRB is a portable open-source implementation of Bioware’s Infinity Engine.

Unknown Horizons Godot Engine Port

The automation tower defense RTS