Real-time Strategy
Endless Sky is a sandbox-style space exploration game
Real Time Strategy game engine supporting early Westwood classics
Free and open source real-time strategy game
Open Source real-time strategy game engine for early Westwood games
A Minecraft Mod about Matter and Energy
Seven Kingdoms: Ancient Adversaries
Cross-platform, GPL reimplementation of the classic : Syndicate
Arianne is an engine to develop multiplayer online games like Stendhal
Europa Universalis 4 save game editor
Automate Diablo 4 tasks and streamline gameplay.
Cross-platform real-time strategy game (3D)
Open source FPS/RTS Game
Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
A free 3d game for PC that does not limit the player. Fight,Build,Gain
A simple gui game that plays the game bagels with users.
Extensible Line-drawing & Polygon-filling Rasterization Libs for Java
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Open source revival of the game Transarctica / Arctic Baron
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
A warlords II clone re-written from scratch in Java
Legatus is network playable Renegade Legion
WeComeInPeace is a simple RTS game that aims towards multiplayer