Open Source: Availability of the source code and the right to modify it
Open Source: The right to redistribute modifications and improvements to the code
Open Source: The right to use the software in any way
1. Name = 0AD OS = Linux, Mac, Windows   Kind = Game (Strategy)  (Free Open Source Real Time Strategy Game) 0AD website
Last Updated on 20110613
2. Name = Advanced Strategic Command OS = Linux, Windows   Kind = Game (Strategy)  (Free Open Source turn based strategy game in the tradition of the Battle Isle series from Bluebyte) Advanced Strategic Command website
Last Updated on 20110614
 
3. Name = Battle for Wesnoth OS = Linux, Mac, Windows   Kind = Game (Strategy)  (Free Open Source turn-based tactical strategy game)