Hitman 2: Silent Assassin Cheats

Animals
When at your home area with the shed of guns, you may shoot down the birds either on the ground or while they fly in the air. Each bird that is shot will fall to its corresponding area and remain there until you leave the level. You can also shoot the pigs in their pen.

Pick locks quicker
Pick a lock, look at your map, and exit. The lock will be picked.

Fast kills
When playing in any level, just run or sneak up to an enemy and fight him with your fists. He will soon be out cold. Once he is, use any gun to shoot him anywhere on his body. He will not get back up.

Running knife attack
Change to first person view and use the knife. You can attack while running if you press the Attack many times

Getting the M4 (M16)
On the motorcade level, you need to clear the town quickly and grab the supplied rifle. Shoot your target. This will cause the UN guards to stop and run on foot to your position. Wait until they get through the gates, then dodge their shots and put them in the cross fire from the remaining troops outside. Since you cannot hurt them, do not shoot. They will soon shoot their own men. Then, just run up and grab an M4. This may not be easy, but it does work.

Getting the .22SD pistol
The .22SD is well hidden in the castle level where you have to kill Hayamoto senior. It is one of the items that is displayed in his museum.

The .22SD does not trigger metal detectors. It is useful in the Basement Killing level.

Holstered Uzi
When holding the Uzi, take out the Ballers. The Uzi will be fully holstered, like a pistol

Silenced ballers gun
Successfully complete a level with a "Silent Assassin" rank.

Sawed-off shotgun
Successfully complete a level with a "Silent Assassin" rank twice.

M4
Successfully complete five levels with a "Silent Assassin" rank to get the M4. Alternately, complete the Shogun Showdown level with a "Silent Assassin" rank.

To get the M4 easier, just use the fiber wire on the UN guards.

Silent Assassin ranks
You can still get a "Silent Assassin" rank on a mission if you are spotted. To get a "Silent Assassin" rank, there has to be nothing in the aggression bar. You can make sure of this by only using chloroform on guards and eliminating the target with just one shot

More ammunition
If you are near a stack of ammunition but are notified by the game that you cannot pick it up, use the following trick to get almost twice as much normal ammunition. For example, if you have a shotgun with full ammunition and are next to a pile of shotgun ammunition, fire one shot, reload, then pick up the ammunition. You will now have almost double the ammunition