Pong
Unlock first level:
Pause game play at the zone selection screen. Press L1, R1, L1, R1, then
resume game play.
Unlock second level:
Pause game play at the zone selection screen. Press L2, R2, L2, R2, then
resume game play.
Unlock third level and more:
Pause game play at the zone selection screen. Hold L1 + R1 + L2 + R2, then
resume game play. This also unlocks the secret power-ups and the three
classic black and white Pong versions.
Level select:
Press L1, R1, L1, R1, L1, R1 at the options screen. Select the star field
beyond what looks like the final level to play the original 1972 Pong.
