Real Time Strategy game engine supporting early Westwood classics
Open source clone of the Age of Empires II engine
RTSish Game Engine
Open source FPS/RTS Game
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Fly around an island casting spells, summon monsters, collect mana, a
starcraft clone game
Open Source WW2 Multiplayer RTS
RTS RPG hybrid game with realistic army and combat management.
library for RTS games with 1st person shooter elements