Voila: a role-playing game set in the world of Piratez, hundreds of years after humanity fell to the aliens. Now you can have your own adventures in that setting: become a human (or a hybrid, or a mutant, etc.), see the wonders of the world, meet interesting beings and kill them dead! Er, or do whatever else people like doing in RPG's.
This system uses mechanics we made with Dioxine some time ago for another game that we're hoping to sell at some point. I've decided to convert it to the X-Com setting for general fun (both mine and yours), and it's very, umm, economical at this stage. Not only the mechanics, but also most equipment was taken from the original game and only renamed, but their design still fits the setting nicely, so it shouldn't give you trouble (though some more renaming is in order). There's no world lore or adventure ideas or anything like that, so for now you must rely on your knowledge of the Piratez mod and your own imagination. But the book already has all the important mechanical stuff, like combat system, race modifiers and so on. The mechanics are quite well-tested, too - it's a few years old already and played by many people.
Get the latest version from the attachment.
Note that you can of course use it for role-playing classical X-Com, but the world of Piratez is much more interesting to role-play I guess, so I made it the primary setting. But you can totally get this book and play shooting Sectoids in 1999.
CHANGELOG:
0.1.1: First publication.
0.1.3: Some small fixes, added some pics.