Press TAB and type "set plyr.ds9_sisko bcheatconsole true". You may then use any of the following cheat commands:

(NOTE: The cheat mode is character-dependent: if you play as Worf or Kyra, you have to use ds9_worf or ds9_kyra instead of ds9_sisko when enabling cheats.)

Code Result

god - God Mode
allammo - All Ammo
fly - Fly Mode
walk - Walk Mode
ghost - No Clipping
killpawns - Kill All Enemies
Invisible - Invisible to Enemies

Other Cheat Codes:

OPEN [mapname] loads in a (user)map in the "maps" folder (extension must be .dsm).

START [mapname] same as above. Examples OPEN M05_SISKOL1A = start at Level 1, Part A. OPEN M05_SISKOL1B = start at Level 1, Part B.

BEAMDOWNITEM [class] spawns an item or weapon in front of you (you will see it be beamed on the floor).

Hints:

Don't underestimate your phaser pistol. Sure, it's not the most powerful of weapons, but since it recharges automatically, you don't have to worry about ammo. Just make sure to wait till its fully charged, though.

You should always be scanning with your Tricorder for helpful clues. Don't rely on it too much, though, because its range is notoriously short; since aliens have a way of beaming in out of nowhere, be ready to switch to a phaser