open source (?)
C-Evo is a strategy game released in 1999 designed and developed by Steffen Gerlach. C-Evo can be described as a open source game and can be played on the following operating systems: Windows.
“C-evo is a freeware empire building game for Windows. With a time scope of several thousand years, it covers aspects of exploration and expansion, industry and agriculture, warfare and diplomacy, science and administration. C-evo follows the spirit of popular turn-based strategy games from the mid 90s, but with more emphasis on powerful AI and careful design of the rules, resulting in a true challenge.” - Steffen Gerlach
Download C-Evo for free