-console
Starts the game with the developer console enabled.

-dxlevel <level>
Forces a specific DirectX version when launching the game. This is useful if your graphics hardware is older, and gets significantly better performance in an earlier version of DirectX. Below are the most common modes used:

-dxlevel 80
-dxlevel 81
-dxlevel 90
-dxlevel 95
-dxlevel 98

-fullscreen
Forces the engine to start in fullscreen mode.

-windowed or -sw
Forces the engine to start in windowed mode.

-w <width>
Forces the engine to start with resolution set to <width>.

-h <height>
Forces the engine to start with resolution set to <height>. This launch option does not need to be set in the presence of -w. The width value with determine the height automatically.

-refresh <rate>
Force a specific refresh rate.

-heapsize <kilobytes>
Specifies the heapsize (in kilobytes) which the game will use. It is adviced not to exceed half of the physical memory of the system.

-nocrashdialog
Suppresses some memory could not be read unhandled errors.

-novideo or -novid
When loading a game with this parameter, the intro Valve video will not play.

-perfectworld
Enables perfect world server in Dota 2.

-lv
Enables some low violence options in Left 4 Dead.

-sillygibs
Enables low violence for Team Fortress 2.

+r_rootlod #
Adjusts Model Detail where # is 0 for high, 1 is medium, and 2 for low.

+mat_picmip #
Adjusts Texture Detail where # is 0 for high, 1 is medium, and 2 for low.

+mat_reducefillrate #
Adjusts Shader Detail where # is 0 for high and 1 for low.

+r_waterforceexpensive #
Adjusts Water Detail where # is 0 for low and 1 for high.

+r_waterforcereflectentities #
Adjusts Water Reflectiveness where # is 0 for low and 1 for high.

+r_shadowrendertotexture #
Adjusts Shadow Detail where # is 0 for low and 1 for high.

+mat_colorcorrection #
Adjusts Color Correction where # is 0 for low and 1 for high.

+mat_hdr_level #
Adjusts High Dynamic Range lighting effects where # is 0 for "off" (requires least resources) and 2 for "full"

Filtering Modes
+mat_trilinear 0
Use Bilinear Mode (least system-intensive)

+mat_trilinear 1
Use Trilinear Mode (more system-intensive)

+mat_forceaniso #
Use Trilinear Mode (where # is 2, 4, 8, or 16 - higher levels of filtering require more system resources)

FPS Performance Maximisation
-novid -sw -noborder -w 1366 -freq 60 -refresh 120 -noaafonts -noforcemaccel -noforcemparms -high -threads 4 -heapsize 1572864 +mat_dxlevel 90

MOBA Performance Maximisation
-novid -sw -noborder -w 1366 -freq 60 -refresh 120 -noaafonts -noforcemaccel -noforcemparms -high -threads 4 -heapsize 1572864 -nod3d9ex

L4D2 Performance Maximisation
-novid -noipx -nojoy -sw -noborder -w 1366 -freq 60 -refresh 120 -noaafonts -noforcemaccel -noforcemparms -high -threads 4 -heapsize 1572864

TF2 Idle Server (Doesn't Work Anymore)
-textmode -novid -nosound -noipx -nojoy -nopreload -sw -noborder -w 640 -dxlevel 81 +map itemtest

Steam Name Style For Dota 2
<font color="#528491">
<font face="Vivaldi">

CS Resources [www.satanion.dk]
ESL GUI 1.15.3 [www.satanion.dk]