A while ago I created a setting, as well as some rules in the GURPS system, for a Cosmic Encoutner roleplaying game. I was just taking a look at it again, and figured I'd post it here, in case anyone was interested. It includes things from all versions of the game, including some fan-made stuff (found here, on the Warp, or created by me). It was made before the latest expansion was released for the current version of the game, so none of that content is used yet. When next I decide to work on this, that will all be included.
So, here it is in PDF format: http://dl.dropbox.com/u/526357/GURPSCosmicEncounter.pdf