R-Type Delta Cheats

Full Energy:
Pause the game. Hold L2 and press Left, Right, Up, Down, Right, Left, Up, Down + Triangle.

Red Power:
Get a Force Pod and pause the game. Hold L2 and press Left, Right, Up, Down, Right, Left, Up, Down + Square.

Blue Power:
Get a Force Pod and pause the game. Hold L2 and press Left, Right, Up, Down, Right, Left, Up, Down + X.

Yellow Power:
Get a Force Pod and pause the game. Hold L2 and press Left, Right, Up, Down, Right, Left, Up, Down + Circle.

Increase credits:
After 3 hours of gameplay, the credit limit will go up to 9.

Unlimited credits:
After 6 hours of gameplay, the 'Free Play' option will be available.

Level select:
Use the bombs more than 10,000 times

Free Play Mode:
Gain over six hours of gameplay

Power Armor:
Beat the game in (humen) or higher difficulty setting, or by playing the game over 100 times

Thanks to Revolution reader Diavoletto and Sebastion Gerard!