Hitman Contracts Cheats

Level select:
Press X, Y, B, Left, Up, Right, L, R at the main menu.

Level skip with Silent Assassin rank and special weapons:
Press R, L, Up, Down, X, A , click Left-Analog stick, press B, A, B, A while playing the game when a level first starts.

Cheat and debug menus:
REMEMBER: This requires a modded Xbox. Copy the game to the hard drive then open the ini file in the main folder. There will be two lines commented out:

//Debugging
//EnableCheats

Remove the comment slashes and you will now be able access an in-game cheat menu by pressing L + Left Analog-stick Down. You can access the debug menu by pressing the L + R.

Second chance:
When you are killed, the screen will turn black and white briefly. Try to shoot four people in the head while this is happening to resume playing with barely any health.
User Cheat by TreeHouseofHorror

Bonus weapons:
Finish the indicated mission with a "Silent Assassin" rank to unlock the corresponding weapon.

CZ 2000 Dual Pistols: Mission 1
Micro Uzi Dual Submachine Guns: Mission 2
Silverballer Silenced Dual Pistols: Mission 3
Magnum 500 Dual Pistols: Mission 4
Sawed-Off Shotgun Dual: Mission 5
M4 Carbine Silenced Assault Rifle: Mission 6
SG220 .S Dual Pistols: Mission 7
MP5 Silenced Submachine Gun: Mission 8
AK 74 Silenced Assault Rifle: Mission 9
GK 17 Dual Pistols: Mission 10
Micro Uzi Silenced Dual Submachine Guns: Mission 11
PGM Silenced Sniper Rifle: Mission 12

All weapons in training level:
Start the training level, then enable the "Level skip" code. You will complete it with a "Silent Assassin" rank. Choose the training level again, and all the weapons in the game will be unlocked in the weapons storage area. This also will unlock the Cardboard Tube weapon.