N2O: Nitrous Oxide Cheats and Tips

Enter the following codes to unlock the corresponding effect.

Unlock Level Select:

Enter Square, Circle, X, Triangle, Triangle, X, Circle, X. Any level up to level 30 can now be selected.

Unlock Bonus Level:

Enter Square, Square, Square, Triangle, Circle, Triangle, Square, Square.

Unlock Weapons:

Enter Square, X, Circle, Square, X, Square, Circle, Square.

Unlock Infinite Lives:

Enter Circle, X, X, Triangle, Square, Triangle, Square, Circle.

Unlock Hidden Ship:

Enter X, X, X, Square, Triangle, Circle, X, Triangle.

Unlock Firewalls:

Enter X, X, Square, X, X, X, Triangle, Triangle.

Unlock H�o Mode:

Enter Circle, X, Square, Triangle, Triangle, Circle, Triangle, Circle.

No Bonus Points Reset:

Enter Square, Triangle, X, Triangle, Circle, Square, Triangle, X.

Disable Cheats:

Enter Square, Square, X, Circle, Circle, Circle, Circle, Triangle.

Unlock Levels

Enter the following codes to unlock the corresponding level.

Unlock Level 3:

Circle, X, Circle, Circle, Square, Triangle, X, Triangle.

Unlock Level 4:

Circle, Circle, Triangle, Circle, Triangle, Circle, Square, Square.

Unlock Level 5:

Square, Triangle, Square, Triangle, Square, Triangle, Triangle, Circle.

Unlock Level 6:

Square, Square, Circle, Square, Triangle, X, Triangle, X.

Unlock Level 7:

X, Triangle, Circle, Square, X, Triangle, Circle, Triangle.

Unlock Level 8:

Square, Circle, Circle, Triangle, Triangle, Square, Triangle, Square.

Unlock Level 9:

Square, Circle, X, Triangle, Square, Square, X, Circle.

Unlock Level 10:

X, Triangle, Square, Circle, Triangle, X, X, X.

Unlock Level 11:

Circle, Square, Triangle, Square, Circle, Triangle, Square, Triangle.

Unlock Level 12:

Circle, X, X, X, Triangle, X, X, Square.

Unlock Level 13:

Square, Triangle, Triangle, Circle, Circle, X, Circle, Circle.

Unlock Level 14:

Square, Square, Triangle, Circle, Circle, Triangle, Circle, X.

Unlock Level 15:

Circle, Triangle, X, Square, Circle, Triangle, Triangle, Triangle.

Unlock Level 16:

Circle, Square, Triangle, X, Circle, Circle, Circle, Square.

Unlock Level 17:

X, Circle, Triangle, X, Square, Square, Square, Circle.

Unlock Level 18:

Circle, Triangle, Circle, Circle, Triangle, Square, Square, X.

Unlock Level 19:

Square, X, Circle, Square, Circle, X, X, Triangle.

Unlock Level 20:

Circle, Square, Triangle, Square, Square, Square, Square, Square.

Unlock Level 21:

Circle, Circle, Circle, Circle, Triangle, X, Triangle, Circle.

Unlock Level 22:

Circle, X, Circle, Triangle, X, Circle, Triangle, X.

Unlock Level 23:

Square, Square, Triangle, Circle, Triangle, X, Circle, Triangle.

Unlock Level 24:

Circle, Circle, Square, Triangle, Square, Triangle, Triangle, Square.

Unlock Level 25:

Circle, X, Triangle, X, Square, Triangle, X, Circle.

Unlock Level 26:

Square, Circle, Circle, Circle, X, Circle, X, X.

Unlock Level 27:

Square, Square, Triangle, Circle, X, X, Square, Triangle.