Infinite grenades (Stage 1) - SXKOZPVG

Start with double capacity magazine (Stage 1) - SZSPYAVG

Double hits (Stage 1) - AEKESYGE

Don't take damage (Stage 1) - SXKAUYVT

Start on stage 2 - GAKEAPIA

Don't take damage (Stage 2) - SZVAXTVT

Start on stage 3 - LAEGGATA

Freeze timer (Stage 4) - SXKEUZVG

Play with more time (Stage 4) - IEVEOPLA

Double hits (Stage 4) - PAKOIPIE

Halve hits (Stage 4) - ZAKOIPIA