You can't sugar coat how poor Jericho is, whilst not the worst next gen game out there (
Far Cry Vengeance on the Wii holds that title) it is completely pedestrian in terms of game play; the piss poor AI doesn't help it and neither does the completely linear maps (it might as well be a rail shooter it's that linear.)
£5 is too much for it, plus for a couple of quid more you can get
UT III and while that game isn't as ground breaking as the original, it's still a damn good FPS.