Open source clone of the Age of Empires II engine
Arianne is an engine to develop multiplayer online games like Stendhal
Command and Conquer: Red Alert original source code
Europa Universalis 4 save game editor
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Mech Station Beta - Tower Defense like Game
Utilities to make running a MegaMek server easier
A free 3d game for PC that does not limit the player. Fight,Build,Gain
The classic multiplayer strategy game for use as a BBS door
Lines a game written in Python two players through internet
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
A suite of tools to make operating a Empire server easier
The classical MasterMind game revisited
These tools make running a Wesnoth MP server on Linux easier
The forever free, ad-free and open source chess server
Fast and robust map analyser for Brood War.
A snarky 2D management game about building and running a dungeon.
Tower Defense
An online multiplayer tactical warfare game for fast action combat!
The BattleShip is an online game developed in Java.