Open-source video game
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An open-source video game, or simply an open-source game, is a video game whose source code is open-source. They are often freely distributable and sometimes cross-platform compatible.
Participants in the Free Knowledge Game Jam 2015, an open source and open data oriented game jam
Warzone 2100
Tremulous
The Battle for Wesnoth
0 A.D. (video game)
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0 A.D. is a real-time strategy video game under development by Wildfire Games. It is a historical war and economy game focusing on the years between 500 BC and 1 BC, with the years between 1 AD and 50
Open-source video game
…games were developed, such as Globulation 2, which experiments with game management mechanics, the similarly experimental Liquid War, the 3D project 0 A.D. (a former freeware project), and Glest. Racing games, another uncommon Linux commercial genre, have also seen development. One of the earliest was RARS…
A Spartan town (Alpha 25)
A Roman town (Alpha 23)