Elite Force is a great FPS game for Star Trek but did you know that some have modified the game in order to turn it into a great Role Play environment? I've post info about this over on StarTrek-Games.com. If you have a group that likes to role play then this could be a great way for you to add a new dimension to the fun.
I've tried this once or twice and found it to be a lot of fun. I highly recommend it - I know I'm new here but I at least enjoyed it.