I had this for the PC and just recently got it for the xbox. Wondering this myself. Will find out if they do soon enough. Too bad the game doesn't have stat tracking.
Edit: I can confirm that yes they do carry over from one platform to the other. I just completed the game and with some weapons I only needed like 20 kills to get the achievement and for playing as a certain race I played maybe 5 games and the achievement popped.
Happy they do and now the game is finally done, years later.
Last edited by sentury111; 04-29-2013 at 08:27 AM.