BUGGY - Preview for Bug Riders
DNEPR - Collision boxes
KAMOV - Sound Test Menu
KIEV - Movie Menu
KIROV - Infinite ammo
KURSK - Invulnerability
LENIN - Enemies Shoot
MINSK - Reset All Cheats
ROGOV - Weird Colors
RUBLE - Better weapons
SNEEG - Sea Hunter game
SOYUZ - Minimal gravity
VOLGA - More Weird Colors

Level Passwords:
AKULA: Mission 2
PAASHA: Mission 3
MIRAS: Mission 4
NASKAT: Mission 5
REZKY: Mission 6
TUCHA: Mission 7
ZARYA: Mission 8
VOSTA: Mission 9

Thanks to Revolution readers P.W. Blazer and Steagus!