[Alt] + \

Where [Alt] + \ are shortcut keys and is one of the strings below.

Effect                     Code
All weapons                FIREPOWER
Current coordinates        WHOAMI
Display (debug counters)   COUNTERS
Display ("Hello?")         HELLO
Display (version)          VERSION
Display (version ID)       VERSION(ID)
Inferred vision            ICANTSEE
Level skip                 NEXTMISSION
Refill Health and Armor    BANDAID
Super Uzi w/ 9999 ammo     SUPERUZI
Turbo mode                 TURBO
Unencrypted communication  GARBLE