This was posted before but inside another post related to different Apps, and since it looks like nobody have considered this one... Well, I would like to see it in a portable paf format.
UFO Alien Invasion is a game (of course) inspired in my favorite all times game X-Com Apocalypse, but this one is 3D, Open Source, modern, and actively on development, it works on any windows platform and also have Mac and Linux versions.
Website: http://ufoai.sourceforge.net/?page=Home
More Info: http://ufoai.sourceforge.net/?page=About
Who wants to make this one?
A million thanks in advance...