DARK SUMMIT CHEATS

Extra points:
Pause, then press Triangle, Square, L1, Circle, R1, X, R1, X.

Challenges completed:
Pause, then press Triangle, Square, L1, Circle, R1, X, R1, Square.

Unlock Alien:
Pause, then press Triangle, Square, L1, Circle, R1, X, R1, X

Shoot projectile:
Pause, then press Square, Circle, Triangle, R1. Press R2 to shoot.

Slow-mo:
Pause, then press Square, Circle, Triangle, L1. Press L1 + R1 to activate