Enter these codes from the Pause screen:
Right(x3), Left, Right, Left, Right, Left(x3)-Big Feet
X(x4), Y(x3)-Big Gun
Left, Right (x2), Left, X, Y, R button, L button, X, T, Left, Right-Explosive Crossbow
R button, L button, Right(x2), Left(x2), Right(x2), L button, R button, X, Y-Explosive Sniper
R button, X, R button, Y, R button, Left, R button, Right, R button, L button (x2), X, L button, Y, L button, Left, L button, Right, X-Level Skip
Right(x2), Left (x2), R button(x2), L button(x2), Y(x2), X(x2)-Missile Crossbow
X, Left, Right, R button, L button, Right, X, L button,(x2), R button, Left(x2)-Missile Sniper
Left, Right(x2), Left, X, Y(x2), X-No Bullet Damage
Y, Left, Right(x2), Left, Y, R button, L button, Y, X, X-One Hit Kill
Left(x3), Right, Left, Right, Left, Right(x3)-Skeleton
X, Y, X, Y, X, Y, X, Y, Left, Y, X, Y, X, Y, X, Y, X-Unlimited Ammo
Left, Right (x2), Left (x2), Right (x2), Left (x2), Right, (x2), Left, X(x2)-Unlimited Life
Left (x2), Right (x2), L button (x2), R button (x2), X (x2), Y(x2)-Unlimited Spy Cam
Y (x2), X (x2), Left, Right (x2), Left, R button, L button, R button-Unlimited TOC