Perfect Dark's extensive Combat Simulator tutorial, and general assistence website. Cheats, tips, tricks, and general help. (For those of you who want that extra edge in Perfect Dark)
Data
# Of Challenges: 30
Difficulty: Too Easy - Too Hard
Time To Finish: 25 or so hours. (If you can finish #28 and 30)
My Advice: Never underestimate the tranquilizer.