Ever stopped playing the UFO: Enemy Unknown (X-COM: Ufo Defense for you american nerds), thinking something along of the lines of, "You know what this needs? More mutant pirate ladies fighting cat ladies and snake ladies while wearing next to nothing and raiding airships from their derelict XCOM base."
No, neither have I.
Thing is, neither you nor I are revolutionary geniuses, apparently.

Introducing X-Piratez, a gloriously NSFW mod for the original X-COM. In X-Piratez, you lead an all-female band of pirates in the post-apocalyptic Earth of year 2600, taking slaves, plundering booty and drinking booze.
Yes, it's exactly as awesome as it sounds.
Yes, you can charge aliens in the nude, wielding only a pipe.

TL;DR - if you aren't into skimpy-clothed airship pirates fighting, among the rest, neo-nazis flying in swastika-shaped UFOs, you probably won't have much fun with this.
Check it out at
http://openxcom.org/forum/index.php/topic,3626.0.html

Don't be fooled by its gimmick, this is BRUTAL.