7.65 Silenced Pistol with 30 Rounds:
C-Up, L, C-Right, C-Left, C-Up

High powered 9mm Pistol with 30 Rounds:
R, L, C-Down, C-Up, C-Up

Uzi with 30 Rounds:
C-Right, C-Left, C-Right, C-Down, R

Mini Rocket Launcher with 30 rockets:
R, L, C-Left, C-Right, C-Down

Kid mode:
C-Down, C-Up, R, L, Z

Big Feet Mode:
C-Down, R, Z, C-Right, C-Left

DK (Big Head) Mode:
C-Down, R, C-Up, L, C-Left

Super Big Head Mode:
If Big Head Mode wasn't enough, try this!
C-Down, L, C-Up, C-Right, L

Turbo Mode:
C-Up, Z ,C-Up, Z, C-Up

Infinite Health:
R, Z, C-Down, R, C-Down

Infinite Ammo:
C-Up, Z, C-Left, Z, L

Bonus level:
Successfully complete the game and wait until the Infogrames logo disappears after the ending credits. The development team will appear on the Embassy level. Speak to all the people here and Ethan and Candace will enter the room.

GameShark Codes

Uzi with Infinite Ammo		800A8EA7 0063
				800A8EA5 0002 

Infinite Ammo			800a8ea7 0063
				800a8eb7 0063
 				800a8ec7 0063
 				800a8ed7 0063
 				800a8ee7 0063
 				800a8ef7 0063

Infinite Health			810862b2 ffff
 
Turbo Mode			800899c80001

Big Head Mode			800892a10001

Huge Head Mode			800892a10002

Big Hands Mode			800892a10003

Big Feet Mode			800892a10004

Big Hands, Head And Feet	800892a10005

Tiny Mode			800892a10006

Kid Mode			800892a10007

Thanks to Revolution readers Geoff Murray, Viperboy, Michael Bulmer, Mike Hedlesky, Steve Santucci, Jason Lee, Jonathan Lee, Ryan, Javy Lopez, Evangelion, Max Retter, Anvit Garg, Nick K., Jesse Morales, Joe, David D., Justin Green, Chris Yodice, Shawn O'Connor, Sean Paul Davis, Thug Life Member, Mr. Bond, Justin, Arun 'Cheat Mastermind', Jon Jones, Matt Scott, Bryce K. Hinchman, and Paul!