10 Flash Bombs
When your strength is at '1', climb a barricade and press Up + Right + Run + II
10 Super Grenades
When your strength is at '1', climb a barricade and press Down + Left + Run + II
50 Bazooka Rounds
When your strength is at '2', climb a fence and press Left + I + II
50 Flame Thrower Charges
Hold Up + I + II and press Run when parachuting at the start of level 2 or level 5.
50 Shotgun Rounds
When your strength is at '2', climb a fence and press Right + I + II
Fast Mode
At the title screen, Up, Down, Right, Right, I, I, II, Select, Run
Hover Mode (In the game press jump to hover.)
At the title screen, Down, Up, Left, Left, II, II, I, Select, Run
Sound Test
At the title screen, hold Up + II and press Select.