The Typing of the Dead: Overkill is great if you only want to use the keyboard, plus it comes bundled with The House of the Dead: Overkill. You'll get to improve your typing skill as you play. There's also The Typing of the Dead, which has the same gameplay, but is actually a version of The House of the Dead 2.
Is there a chance you made this thread because you're looking for games to play on a laptop where using a mouse is inconvenient, like in public transportation?