Quake 4
While playing the game, press Back to display the objectives window,
then quickly press:
Down, Up, Down(2), Up, Right, Left, Right, Y, X(2), A – Invincibility
B, A, X, Y, Left, Right, Left – Full ammo reload
B, A, B, A, Up(2), Down, X – Full health
Up(2), Down(2), Left, Right, Left, Right, B, A – Get all