-noforcemaccel ; Use desktop mouse acceleration settings
-noforcemspd ; Use desktop mouse speed settings.
-noforcemparms ; Use desktop mouse buttons settings.
-noaafonts ; Disables Anti-Aliasing of Screen Fonts.
-heapsize 262144 ; 512MB System Memory
-heapsize 524288 ; 1GB System Memory
-heapsize 1048576 ; 2GB System Memory
-w 640 -h 480 ; 640x480
-w 800 -h 600 ; 800x600
-w 1024 -h 768 ; 1024x768
-full ; Forces the engine to start in fullscreen mode.
-window ; Forces the engine to start in windowed mode.
-freq 100 ; Changes the Hertz for monitors HL1 Engine. CRT 60-100 85=Common LCD 60-75 72=Common
-refresh 100 ; Changes the Hertz for monitors HL2 Engine. CRT 60-100 85=Common LCD 60-75 72=Common
-soft ; This enables Software hardware rendering mode.
-d3d ; This enables Direct3D hardware rendering mode.
-gl ; This enables Open GL hardware rendering mode.
-nojoy ; Remove joystick support, more ram free.
-noipx ; Disables LAN protocall.
-noip ; Some IP related command remove if unable to connect to servers.
-32bpp ; Enables 32Bit rendering.
-16bpp ; Enables 16Bit rendering.
-dxlevel 90 ; DirectX 9
-dxlevel 81 ; DirectX 8.1
-dxlevel 80 ; DirectX 8
-dxlevel 70 ; DirectX 7
-dxlevel 60 ; DirectX 6
-port 27015 ; Changes your port # for the game.
-console ; When launching Half-Life, this will take you straight to the console.
-dev ; This is for developer mode.
-zone # ; This allocates more memory to scripting files, like autoexec.cfg and so forth.
-game [mod\'s name] ; Enable Half-Life to play modification games other than to go through the menu to select them.
-safe ; It start the game in safe mode disable audio etc.
-autoconfig ; Restores video and performance settings to default for the current hardware detected.
-condebug ; Logs all console output into the console.log text file.
-nocrashdialog ; Suppresses some \'memory could not be read\' unhandled errors.
-novid ; When loading a game with this parameter, the intro Valve video will not play.
-toconsole ; Starts the engine directly in the console, unless a map is specified with +map.
+a +r_mmx 1 ; Instead of using a cfg you can launch the game with a command or a cvar in the command line.
+ex_interp 0.01 ; Sets ex_interp value