Rainbow Six

Change your weapon to the grenades and hold Z until the throw meter is filled. When the grenade is being thrown, hold Z again until the meter is full. Repeat this until you are on the last grenade. When it is thrown, you will have 255 grenades.

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To be unaffected by the flash bang grenades, turn on night vision goggles. Leave them on untill the effects of the grenade wear off.

On the last level, Mystic Tiger, you can actually kill John Brightling. Once you reach the end of the level, throw a grenade at the window of the room he is in. The window will break and you can shoot him.

Use the nightvision goggles after getting hit with a flashbang grenade to quickly restore your sight.

When you throw a flashbang grenade, wear your night vision goggles and you will not be affected.

Hold Analog-stick Down to duck. This is useful when you are shooting out a window at a terrorist and he fires back, or if you need to get past a large window like that on the last level. Just duck and run to avoid getting shot.

Hold R when walking to run.

When using your main weapon, before you run out of ammunition change the magazine. Do this repeatedly to get unlimited ammunition. Note: Do not try this with the secondary weapon -- it will not work and your ammunition supply will slowly wear down.

Without being detected In Mission: Deep Magic

This (Believe or not) is very simple, all you have to do is bring grenades (Mission: Deep Magic) and you can kill everybody with them without being detected ;)

At the title screen, press C-Right, then hold Z + B and quickly press R.