0 A.D. Alpha 26

0 A.D. (pronounced “zero-ey-dee”) is a free, open-source, historical Real Time Strategy (RTS) game currently under development by Wildfire Games, a global group of volunteer game developers. As the leader of an ancient civilization, you must gather the resources you need to raise a military force and dominate your enemies.

Warzone 2100 4.4.2

Command the forces of "The Project" in a battle to rebuild the world after mankind has almost been destroyed by nuclear missiles. The game offers a full campaign with optional (but strongly recommended!), videos, battle against four factions, multiplayer and single-player skirmish modes, and an extensive tech tree and a full unit designer. Multiplayer is also cross-platform - battle your friends with any OS, Windows, Linux or macOS, it all works seamlessly!

Conquest 9.1

Conquest is a top-down, real time space warfare game. It was originally written in RATFOR for the VAX/VMS system in 1983 by Jef Poskanzer and Craig Leres. I spent incredible amounts of time playing this game with my friends in the terminal labs at college, and when I actually had a multi-user system running at home (Unixware) I decided to try and translate/port the code to C in Unix. This was in the early to mid 1990's. Of course, over the years many things have changed. Today, Conquest is a t