Simulation

CorsixTH

Open source clone of Theme Hospital

Vaata

Endless Sky

Space exploration and combat game

Vaata

FlightGear

A free and highly sophisticated flight simulator

Vaata

Julius

Julius is an open source re-implementation of Caesar III

Vaata

Minetest

Multiplayer infinite-world block sandbox game

Vaata

OpenRCT2

A construction and management simulation video game that simulates amusement park management

Vaata

OpenTTD

A highly detailed transport simulation game

Vaata

Powder Toy

Physics sandbox game

Vaata

Search and Rescue II

Rescue Helicopter Simulator

Vaata

Taigo

Taigo is a virtual pet for your desktop

Vaata

Voxelands

The Fun-Focused Free Software Voxel World Game

Vaata