Open Source Simulation Games

OpenTTD is an open source transport simulation game based on the popular game Transport Tycoon Deluxe by Chris Sawyer, with several additions. OpenTTD is as close to the original as you can get, but has been extended with plenty of great features. These include bigger maps (up to 64 times bigger than the original), stable multiplayer mode that allows for up to 255 players in 15 companies, in-game downloading of heightmaps, AIs, scenarios, and so much more. With its many additions and improvements players are sure to have a greatly enhanced gaming experience. Try it for yourself!

Criminal minds revealed and played. Criminal acts in all sorts of places with great animation and daily updated by Developer Fontella Moneet Farrar.

Forgotten Destruction is a free real-time strategy game developed using the Simple DirectMedia Layer. It focuses on the conflict between an evil shadowy empire and human race with their nearby allies.

Pizza Business is a game written in object-oriented C++, utilizing WxWindows, in which you start and control a pizza business / pizza restaurants, limited to a budget. The game is being targeted for multiple platforms including Windows and Linux.