MegaGlest is a free open source 3D real-time strategy game where 
you control the armies of one of seven different factions:  Tech, 
Magic, Egyptians, Indians, Norsemen, Persian or Romans.  The game 
is setup in one of 16 naturally looking settings, which (like the 
unit models) are crafted with great appreciation for detail.

Optional dependencies: libircclient, miniupnpc, vlc, p7zip