House of The Dead Overkill is also fantastic. One of the best OSTs out there and it's really funny in places. That and Dead Space Extraction as already mentioned by others are also essential purchases. I'm also going to get the other House of The Dead games at some point too, one of my favourite franchises.
It's a real shame that Midway have had so many financial problems, I'd love to see a port of CarnEvil, my all-time favourite on-rails shooter of all-time. It's brilliant.







