"On the level: Control Tower 2, when you're facing the Agent's Helicopter, watch out for his machine gun bullets! As the weapon of choice, use the sniper rifle because it does the most damage." - Andrew Hall

"When Playing as Niobe, In the Nuclear powerstation, here's a good tip to use.When you come to the level where you have to reach the nuclear core to place the bomb inside, which is quite a difficult level, especially on Hard mode,Instead of running around the place and actually working your way to the core, simply walk back and place your back against the wall at the very start of the level and hold down Focus.Then run foward at the rail and jump, remembering to keep Focus held down, you should land on the platform opposite, and low down (The one with the guard on it who shoots at you at the every start) If you're lucky enough he won't have even noticed you and you can just silently take him down, then it's a matter of eliminating two or three other enemies and then completing the level under a minute!" - Marcus Keeley

"When fighting the ahent helecopter (1) Dont use anything except the machine gun (2) Look for the chopper then hid behind a colume that is out of the choppers firing range then catwheel and shot it reapet this process and you will be able to blow the agent up.(3) How to cartwheel should be in your tips section of the start screen" - anonymous

"On the Waterhole always use the shotgun because it throws five bullets at a time.So you can do double kills." - Etka

"On the nuclear power plant level when u have 2 save Niobi do not REPEAT;do not climb the net or niobi will die straight away!" - Ghost