Contra: Legacy of War Cheats...
FX Test
At the Title screen, press Y, Down, L, R, Up.
Hidden Game 1
At the Title screen press Y, Down, Up, L, R, Left.
Hidden Game 2
At the Title screen press Y, Down, Up, L, R, Right.
Level select
At the title screen Press Y, DOWN, UP, R, L, L R there should be a noise.
Movie Test
At the Title screen press Y, Down, Up, L, R, Down.
Unlimited Continues
At the Title screen press Y, Down, Up, L, R, R, L.
Weapon Select
At the Title screen, press Y, Down, Up, L, R, L, R. While playing, hold A+C while pressing Y to change your weapon.
More Cheats, Achievements...
FX Test...