Can't lose lives in elevator shaft - SZUPLOVK

Start with 1 life - PENPIALA

Start with 6 lives - TENPIALA

Start with 9 lives - PENPIALE

Oxygen used up more slowly in shaft - NYSXAOAN

Oxygen used up more quickly in rooms - AYXXSNNY

Won't take damage from shots and collisions - AAEPZIPA

Infinite bombs in elevator shaft - VTNSEXSX

Infinite bombs in rooms - VVVSXXSX

Infinite detonators in shafts - VVOSSXSX

Infinite detonators in rooms - VTESNUSX

Infinite keys in shafts - VTEZIKSX

Infinite keys in rooms - VVOXTOSX

Start on level 5 - OZEPOISE + IAEPXSVI

Start on level 10 - OZEPOISE + ZAEPXSVS

Start on level 15 - OZEPOISE + YAEPXSVS