ive only played half life on pc, as not a huge pc gamer ( chap is the only other game ive played on pc a lol) at first mouse keybord combo is weird, but you can tell straight away aiming is a lot easier. onceyou get used to it, its very cool, only prob i found is with games where thereare to many moves, and where ive not had enough practice, i dont know the best layouts for the buttons, you shoudnt get this prob with halo though, not many buttons