Quake 2[CHEAT]

Enter the command console (press [~]) then type

Note: [#] means any number (if you type "give blaster 255" then you'll get 255 blasters (WOW!...like you need it!). The same
goes for all the other weapons. The [] means its optional.

god - Enables god mode
give blaster [#] - Gives you the weapon you start with (DUH?)
give shotgun [#] - Gives you the Shotgun.
give sshotgun [#] - Gives you the Super Shotgun.
give machinegun [#] - Gives you the Machine Gun.
give grenadelauncher [#] - Gives you the Grenade Launcher.
give rocketlauncher [#] - Gives you the Rocket Launcher.
give shells # - Gives you # number of Shotgun Shells.
give bullets # - Gives you # number of Bullets.
give grenades # - Gives you # number of Grenades.
give rockets # - Gives you # number of Rockets.
give quad [#] - Gives you # number of Quad Damage Power Ups.
give envirosuit [#] - Gives you # number of Environment Suits.
give invulnerability [#] - Gives you # number of Invulnerability Power Ups.
give silencer [#] - Gives you # number of Silencers.
give rebreather [#] - Gives you # number of Rebreathers.
give jacketarmor [#] - Adds # Jacket Armor points.
give bodyarmor [#] - Adds # Body Armor points.
give combatarmor [#] - Adds # Combat Armor points.
give health 999 - 999 health (doesn't add to your health)
g_unlimited_ammo 1 - All ammo gets stuck at 999! (but you need to get the ammo first, Of course.)
g_unlimited_ammo 0 - Ammo goes back to normal.
noclip - Turn off clipping
status - Displays info on the current game
sv_gravity xxx - Gravity; xxx represents a number from 00 to
850,where 00 equals no gravity and 850 is normal gravity
crosshair 1 - Cross wires on
crosshair 0 - Cross wires off
notarget - Invisibility
map start - Jump to the start of level (might not work)
map end - Jump to the level end boss (might not work)
team "team name" - Sets your team name.
gamemap (map) - Chooses map to play on.

Other interesting stuff: (following quite useless, just for completeness)

give powershield [#] - Gives you a Power Shield.
give powerscreen [#] - Gives you a Power Screen.
give item_adrenaline [#] - Gives you Adrenaline.
give item_bandolier [#] - Gives you Bandolier.
give item_pack [#] - Gives you Ammo Pack.
give key_data_cd - Gives you the Data CD.
give key_power_cube - Gives you the Power Cube.
give key_pyramid - Gives you the Pyramid key.
give key_data_spinner - Gives you the Data Spinner.
give key_pass - Gives you the Passkey.
give key_blue_key - Gives you the Blue Key.
give key_red_key - Gives you the Red Key.
give key_commander_head - Gives you the Commaner's head.
give key_airstrike_target- Gives you the Airstrike Marker.
give cells # - Gives you # number of cells.
give slugs # - Gives you # number of slugs.
give mines # - Gives you # number of mines.
give nuke # - Gives you # number of nukes.
wait - ??(multiplayer)?