To enter cheat mode you must follow these steps ......
1. After the game has started press the key above the tab key or the tilde ( ~ ) key (shift + `)
2. Enter /sv_cheats 1 exactly and "sv_cheats is a read only" should appear.
3. Then enter /devmap [mapname] example: /devmap q3dm0
*Note: after entering a map this way you will the game will restart
with cheats enabled, but you will be alone in the game,
simply hit ESC and select "Add Bots" and choose the bots you
want to fight and then click "Accept", you can then add another bot
if you want.

Map Names/Tiers:
Mapname Level Name Bots to add

Tier 0: q3dm0 - Introduction - add bot: Crash
Tier 1: q3dm1 - Arena Gate - add bot: Ranger
q3dm2 - House of Pain - add bot: Phobos
q3dm3 - Arena of Death - add bots: Mynx, Orbb
q3tourney1 - Powerstation 0218 - add bot: Sarge
Tier 2: q3dm4 - The Place of Many Deaths - add bots: Orbb, Bitterman, Grunt
q3dm5 - The Forgotten Place - add bots: Hossman, Daemia
q3dm6 - The Camping Grounds - add bots: Orbb, Hossman, Daemia, Bitterman, Grunt
q3tourney2 - The Proving Grounds - add bot: Hunter
Tier 3: q3dm7 - Temple of Retribution - add bots: Daemia, Wrack, Grunt, Slash
q3dm8 - Brimestone Abby - add bots: Gorre, Bitterman, Slash, Angel
q3dm9 - Hero's Keep - add bots: Angel, Gorre, Wrack, Slash
q3tourney3 - Hell's Gate - add bot: Klesk
Tier 4: q3dm10 - The Nameless Place - add bots: Angel, TankJr, Wrack
q3dm11 - Deva Station - add bots: Lucy, Biker, Patriot, TankJr
q3dm12 - The Dredwerkz - add bots: Slash, Gorre, Lucy, Biker, Patriot, Wrack
q3tourney4 - Vertical Vengeance - add bot: Anarki
Tier 5: q3dm13 - Lost World - add bots: Visor, Razor, Stripe
q3dm14 - Grim Dungeons - add bots: Visor, Razor, Keel, Stripe
q3dm15 - Demon Keep - add bots: Razor, Keel, Stripe
q3tourney5 - Fatal Instinct - add bot: Uriel
Tier 6: q3dm16 - The Bouncy Map - add bots: Cadavre, Bones, Doom
q3dm17 - The Longest Yard - add bots: Major, Sorlag, Doom
q3dm18 - Space Chamber - add bots: Major, Sorlag, Cadavre, Bones, Keel
q3dm19 - Apocalypse Void - add bots: Sorlag, Doom, Cadavre
Tier 7: q3tourney6 - The Very End of You - add bot: Xaero
Unlock All Levels at Skill 1
Bring down console and type: /iamacheater
Unlock All Levels at Skill 100
Bring down console and type: /iamamonkey
Hidden Sarge Skin
Bring down console and type: /model sarge/krusade In order to use the following cheats in
multiplayer mode, the server must have cheats enabled (ie: /devmap [mapname])
God Mode
Bring down console and type: /god
All Weapons
Bring down console and type: /give all
You can also use the following codes with the /give command:
/give allammo
/give armor
/give battle suit
/give bfg10k
/give flight
/give gauntlet
/give grappling hook
/give grenade launcher
/give haste
/give health
/give invisibility
/give lightning gun
/give machinegun
/give medkit
/give megahealth
/give personal teleporter
/give plasma gun
/give quad damage
/give railgun
/give regeneration
/give rocket launcher
/give speed
/give shotgun