Access the following levels by entering the corresponding passwords:

LEVEL - PASSWORD
1 - NTRO     
2 - 1STS     
3 - 2NDS     
4 - TRSH     
5 - SW1M     
6 - W0LF     
7 - BR4T     
8 - K4RN     
9 - B0MB     
10 - WZRD     
11 - BLKS     
12 - TLPT     
13 - GYSR     
14 - B3SV     
15 - R3T0     
16 - DRNK         
17 - Y0VR
18 - 0V4L
19 - T1N3
20 - D4RK
21 - H4RD
22 - HRDR
23 - L0ST
24 - 0B0Y
25 - H0M3
26 - SHCK
27 - TNNL
28 - H3LL
29 - 4RGH
30 - B4DD
31 - D4DY

Activate the following cheats by entering the corresponding passwords:

CHEAT FUNCTION - CHEAT CODE
View credits - CR3D
Start at highest level previously reached - W4RP
Invincibility - CH3T