Krzysztof Smiechowicz made a AROS version of the MegaGlest strategy game. MegaGlest is an open source 3D strategy game, where you control the armies of one of seven different factions: Tech, Magic, Egyptians, Indians, Norsemen, Persian or Romans. In the game you must establish settlements, defend yourself and gather resources. The game is also available for Linux, Windows, Mac OS X and FreeBSD.

The MegaGlest web page.