When you play solo, set break and made one of the following (a sound will confirm the transaction):
Invulnerability
High, High, Left, Down, Down, Down, Left, Up, Up, Up, Left, Right
Alternatif Sounds
High, High, Left, Up, Down, Up, Up, Left, Down, Down, Down, Left, Up, Down, Down, Left, Right
Unlimited Munitions
Up, Down, Left, Down, Down, Left, Down, Down, Left, Down, Down, Down, Left, Right
No HUD
High, High, Left, Up, Up, Down, Left, Down, Up, Up, Left, Right
Soldiers in low resolution
Low, Low, Low, High, Left, Low, Low, Low, Low, Low, Left, High, High, Left
Little funny animation when rebels are killed
Up, Down, Left, Down, Left, Right