GoldSource Engine Game Graphics Modes
=====================================
Graphics Renderers
------------------
Software
Direct3D
OpenGL

Color Depths
------------
16-Bit
32-Bit

Note that the "Software" graphics renderer only supports 16-bit color depth.

Window Modes
------------
Fullscreen Mode
Windowed Mode

Normal Display Mode Resolutions
-------------------------------
640x480
800x600
1024x768
1152x864
1280x1024

Widescreen Display Mode Resolutions
-----------------------------------
1280x720
1280x800
1680x1050
1920x1080

Windows Registry Key Entries
----------------------------
[HKEY_CURRENT_USER\Software\Valve\Half-Life\Settings]
"EngineDLL"="*1"
"EngineD3D"=dword:*2
"ScreenBPP"=dword:*3
"ScreenWindowed"=dword:*4
"ScreenWidth"=dword:*5
"ScreenHeight"=dword:*6
"CrashInitializingVideoMode"=dword:*7

*1: sw.dll = "Software" graphics renderer.
    hw.dll = "Direct3D" and "OpenGL" graphics renderers.

*2: 00000000 = "OpenGL" graphics renderer.
    00000001 = "Direct3D" graphics renderer.

    Note that this entry is ignored for the "Software" graphics renderer.

*3: 00000010 = "16-Bit" color depth in Hex (10 Hex = 16 Decimal).
    00000020 = "32-Bit" color depth in Hex (20 Hex = 32 Decimal).

*4: 00000000 = "Fullscreen" mode.
    00000001 = "Windowed" mode.

*5: 00000### = Display mode resolution screen width in Hex.
*6: 00000### = Display mode resolution screen height in Hex.
    00000280 Hex = 640 Decimal
    000001E0 Hex = 480 Decimal
    00000258 Hex = 600 Decimal
    000002D0 Hex = 720 Decimal
    00000300 Hex = 768 Decimal
    00000320 Hex = 800 Decimal
    00000360 Hex = 864 Decimal
    00000400 Hex = 1024 Decimal
    0000041A Hex = 1050 Decimal
    00000438 Hex = 1080 Decimal
    00000480 Hex = 1152 Decimal
    00000500 Hex = 1280 Decimal
    00000690 Hex = 1680 Decimal
    00000780 Hex = 1920 Decimal

*7: 00000000 = Crash did not occur during last graphics mode initialization.
    00000001 = Crash occured during last graphics mode initialization.

    Note that "00000001" resets the graphics mode settings to the game installation defaults.