Gameguru Mania - cheats

Eos: Edge Of Skyhigh [PSX]

Invincibility
Pause the game and press Up(2), Right(2), Down(2), Left(2), Square, Triangle, Square, Triangle.

Level select
Pause the game, hold L1 + L2 + R1 + R2, and press Triangle, Square, Right, Down, Left, Up.