Water mode:
Enter Circle, X, Square, Triangle, Triangle, Circle, Triangle, Circle as a password.

Unlimited lives:
Enter Circle, X, X, Triangle, Square, Triangle, Square, Circle as a password.

Level select:
Enter Square, Circle, X, Triangle, Triangle, X, Circle, X as a password. Any level up to level 30 may be selected. Alternatively, enter Square, Triangle, Circle, Triangle, X, Triangle, Square, X as a password.

Bonus level select:
Enter Square, Square, Square, Triangle, Circle, Triangle, Square, Square as a password.

Weapons:
Enter Square, X, Circle, Square, X, Square, Circle, Square as a password.

Firewalls:
Enter X, X, Square, X, X, X, Triangle, Triangle as a password.

Hidden ship:
Enter X, X, X, Square, Triangle, Circle, X, Triangle as a password.

No bonus points reset:
Enter Square, Triangle, X, Triangle, Circle, Square, Triangle, X as a password.

Disable cheats:
Enter Square, Square, X, Circle, Circle, Circle, Circle, Triangle as a password.

Level Code
2 OXXXSOSX
3 OXOOSTXT
4 OOTOTOSS
5 STSTSTTO
6 SSOSTXTX
7 XTOSXTOT
8 SOOTTSTS
9 SOXTSSXO
10 XTSOTXXX
11 OSTSOTST
12 OXXXTXXS
13 STTOOXOO
14 SSTOOTOX
15 OTXSOTTT
16 OSTXOOOS
17 XOTXSSSO
18 OTOOTSSX
19 SXOSOXXT
20 OSTSSSSS
21 OOOOTXTO
22 OXOTXOTX
23 SSTOTXOT
24 OOSTSTTS
25 OXTXSTXO
26 SOOOXOXX
27 SSTOXXST