As it's coming up for the time of year when MrsB and I start asking each other what we want for Christmas, I'm after any recommendations as to good XBox 360 games that I might ask for. Just to narrow it down a bit, I'm after a first person shooter along the lines of Doom and Quake. I got Jericho last year, which was OK (but could have been a lot better if the characters weren't programmed to be suicidally idiotic). Preference is to kill monsters rather than humans but I could waive my rather feeble principles for the sake of an enjoyable, challenging game. As my exposure to games has been limited to date, it doesn't have to be a new release. Indeed, older games (hence cheaper) might let me have two rather than one.