Command Line Parameters

Linux:
-cddev
-sndbits
-sndspeed
-sndmono
-sndstereo
-noconinput
-nostdout
-stayactive
-novmode

Both:
-demos
-fileul
-nocdaudio
-qmenu
-rogue
-nosound
-simsound
-crashonerror
-debugip
-heapsize
-mem
-nomutex
-starttime
-usehome
-nohome
-condebug
-ip
-ip6
-nodlls
-nosos
-lang
-langugly
-noamtex
-nomtex
-nobump
-save15to8
-conwidth
-conheight
-fullscreen
-no8bit
-gamma
-game
-noreset
-register
-unregister
-noq2dll
-surfcachesize
-nodib
-noddraw
-verbose
-visualid

Windows:
-m_mwhook
-mouse2
-wavonly
-zbpp

Even more:
-dinput
-noforcemspd
-noforcemaccel
-noforcemparms
-minmemory
-window
-startwindowed
-width
-height
-nomouse
-nojoy
-particles
-primarysound
-snoforceformat
-soundspeed
-singlesound
-nomultipledevices
-multisound
-dedicated
-basedir
-basegame
-port
-clport
-port
-svport
-lm_1
-lm_a
-lm_i
-lm_3
-lm_4
-cheats
-zone
-bpp