Invincibility

Pause the game and press Down, L2, Square, R1, Right, L1, Left, Circle.

Level select

Pause the game and press Right, Left, R2, R1, Triangle, L1, Circle, X.

Weapons, ammunition, and keys

Pause the game and press X, Triangle, L1, Up, Down, R2, Left(2). Now all weapons, ammunition for them, and keys for the current level will be available.

Map all lines

Pause the game and press Triangle(2), L2, R2, L2, R2, R1, Square. Now all walls and boundaries will appear on the map for the current stage.

Map all objects

Pause the game and press Triangle(2), L2, R2, L2, R2, R1, Circle. Now all objects including enemies, items, weapons, and secret switches will appear on the map.

Transparent walls

Pause the game and press L1, R2, L2, R1, Right, Triangle, X, Right. Now your character may see through one layer of wall or sprites.

Mission passwords

Master level:

Mission	Password
2	610QNNFT35
3	F!R251P1FD
4	RBB4M6HRST
5	QWC5CS83QS
6	NJJ64RFRPM
7	N1J74MYSPR
8	811TMQ8W64
9	7KKNL7D443
10	28RFDDS5YX
11	C66YZLSGGG
12	GR85XJVNBD
13	C33V2DHGHK

Level 2:

Mission	Password
2	7GGLPXL746
3	YZGLPX2!56
4	XHHSNYB965
5	75NK!VGZZO
6	C2253RNRML
7	NT!3JRNDCB
8	8LLT8KRV02

Level 3:

Mission	Password
10	!6PQGGJVOZ
11	WHHTNNPS65
12	O1JQYV3N34
13	5MMD72GFZ1
14	HK25JRDQNL
15	S772MKWKCF
16	78RB35L1VX
17	J226DG5PNL