UFO:AI , turn based, 3D strategy game based on concepts of X-COM series is now available for AROS.
The port was done by none other than Krzysztof Smiechowicz (Deadwood - the same author as the Ghalium AROS port).
Please check README file for links and information about hardware requirements.
Have fun and watch out for more 3D game ports in future from Krzysztof!
The game can be downloaded from: http://download.aros3d.org/releases/ufoai-2.3.1.i386-aros.zip
You need to download game content separately: http://ufoai.org/
Deadwood also prepared a short presentation video for you to feast your eyes on: