Press L2 ten times and R2 ten times at either the R-Type or R-Type II option at the title screen. Press Start while playing
to access any level or view the FMV sequences.
All weapons
Press Start to pause game play in R-Type or R-Type II. Hold L2 and press Right, Up, Left, Right, Down, Left, Up, Right followed by one of the following buttons for various weapons: Triangle, Square, X, Circle, or R1.
Extra credits
Repeatedly press Select at the title screen of any R-Type game to get up to 99 credits. This may also be done at the countdown on the game over screen to continue.
Slower Ship
Pause the game then hold L2 and press Right, Up, Right, Up, Down, Left, Down, Left, X.
Faster Ship
Pause the game then hold L2 and press Right, Up, Right, Up, Down, Left, Down, Left, Circle.