Reviews and Previews
Coming Soon Magazine, Game Revolution, GameSpot Review, Science Fiction Weekly, The Electric Playground
Cheat Code Central
Lists cheats to allow level selection and inifinite weapons, and game shark codes.
GameFAQs
FAQ covering controls, display, weapons, training and Act 1 mission walkthroughs, and cheat codes.
IGN Guides
Contains general tips and system specific mission walkthrough.
Video Game Strategies
Contains mission walkthrough, with mission paths and gameplay tips.