If you are having a problem with the point and click adventure game from gamesfree.com, just use the following handy Deadly Venom cheats. Play it here. Enter the cheats via the Extra & Treasures section in the game.
Unlock Costume # 2 : SEXY
Unlock Wallpaper # 2 : WALL
Infinite knives and tranquilizer munitions : AMMO
Fast run for stealth attacks : FAST
Ninja screams during stealth actions : YIAH
Orgam screams during stealth actions : YESS