These are passwords to various stages for practice purposes only. You are given 99 lives, but when you complete an area, you are not allowed to continue.
PLVT0NM - Sector 0
R3SCV3* - Sector 0
SP33D3R - Sector 1
FIXTNKR - Sector 1
R34CT0R - Sector 1
S3CVRTY - Sector 1
D4R*WIN - Sector 2
TOXIC4V - Sector 2
PRIS0NR - Sector 2
DRVGL4B - Sector 2
B4TLSHP - Sector 2
SHI3LD* - Sector 2
(* Designates the SeaQuest symbol)