Cheats
You want more? You can have more. Hit ~ (tilde key) as you would in Quake, and type these commands to get weapons and items as described.

Give all
Give blaster
Give bullets
Give cells
Give grenadelauncher
Give grenades
Give invulnerability
Give jacketarmor
Give machinegun
Give mines
Give nuke
Give quad
Give rebreather
Give rocketlauncer
Give rockets
Give shells
Give shotgun
Give silencer
Give slugs
Give sshotgun
God
Noclip
notarget