If you can fit this quote in as well, goblinkind will forever be indebted to you: "It's basically a pile of crayon-scribbled napkins that I've stapled together, and now I'm waving them at you in an elevator telling you about my "revolutionary" new gaming system, while holding up my torn sweatpants with the other hand." -Arnold K.
Not sure if I'm qualified to sum up Mothership but here goes: -Mothership is a sci-fi horror roleplaying game that focuses on characters' vulnerabilities while they are trying to survive in highly inhospitable environments. www.tuesdayknightgames.com/mothership/
To accompany the GLOG quote: "When you reach the floor you were heading towards, finally fleeing the elevator, there are a dozen spit-flecked zealots waving their *own* version of GLOG at you. Where did they all come from?"
What's the difference between different "editions" of GLOG? Umm... next question please! In all seriousness, there might be a few extra houserules, a few different classes and a perhaps different level of attention paid to particular mechanics. Pick one you like the formatting of and go wild.