Funny thing is, this movie manages to be very entertaining and well made, despite being absolutely nothing like the videogame series it was based on.  Oh sure, you've got some famous monsters from the game.  There are zombies and for a few scenes some lickers, but the suspense and claustrophobia the game was famous for gets thrown away in favor of violent action.  The eerie fixed camera angles from the game are ditched.  The bloody hallways, and creepy silence is lost, and instead we get a futuristic science lab type building.