I wasn't expecting much from Resurrection of Evil and for a change I was pleasantly surprised. While it is still Doom3, the level design has much more variety and as such the game just flows better. If you got bored playing Doom3, it's much less likely you'll get quite as bored playing this, part of the reason is that you simply won't get time. Unfortunately Resurrection of Evil is just too short for an expansion pack costing as much as most full games.