Merowinger86: I can't change the resolution and other graphic settings. The game crashed and I see this in the console:

--- Common Initialization ---
Medal of Honor Allied Assault 1.11 win-x86 Mar 5 2002
----- FS_Startup -----
Current search path:
C:\GOG Games\Medal of Honor - Allied Assault War Chest/main
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\pak7.pk3 (89 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak6EnUk.pk3 (395 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak5.pk3 (259 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak4.pk3 (593 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak3.pk3 (669 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak2.pk3 (4722 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak1.pk3 (396 files)
C:\GOG Games\Medal of Honor - Allied Assault War Chest\main\Pak0.pk3 (11174 files)

----------------------
18297 files in pk3 files
execing default.cfg
execing menu.cfg
execing newconfig.cfg
Config: unnamedsoldier.cfg
execing configs/unnamedsoldier.cfg
couldn't exec localized.cfg
execing autoexec.cfg
Unknown command "fov"
couldn't exec custom.cfg
...detecting CPU, found Intel Pentium III

------- Input Initialization -------
Initializing DirectInput...
Couldn't set DI coop level
Falling back to Win32 mouse support...
------- Input Initialization Complete ------- 15
You are now setup for easy mode.
----- Client Initialization -----
Called FadeSound with: 0.000000
----- Initializing Renderer ----
----- R_Init -----
Initializing OpenGL subsystem
...initializing QGL
...calling LoadLibrary( 'C:\Windows\system32\opengl32.dll' ): succeeded
...setting mode 9: 1600 1200 FS
...using colorsbits of 32
...calling CDS: failed, bad mode
...trying next higher resolution: failed, bad mode
...restoring display settings
...registered window class
...created window@0,0 (1606x1228)
Initializing OpenGL driver
...getting DC: succeeded
...GLW_ChoosePFD( 32, 24, 0 )
...59 PFDs found
...hardware acceleration found
...PIXELFORMAT 2 selected
...creating GL context: succeeded
...making context current: succeeded
...WARNING: fullscreen unavailable in this mode
...setting mode 9: 1600 1200 FS
...using colorsbits of 16
...calling CDS: failed, bad mode
...trying next higher resolution: failed, bad mode
...restoring display settings
...window already present, CreateWindowEx skipped
Initializing OpenGL driver
...WARNING: fullscreen unavailable in this mode
...shutting down QGL
...unloading OpenGL DLL
...assuming '3dfxvgl' is a standalone driver
...initializing QGL
...WARNING: missing Glide installation, assuming no 3Dfx available
...shutting down QGL
GLW_StartOpenGL() - could not load OpenGL subsystem

hunglai86: I solved this error on win 10 by by following these steps:
- Set MOHAA.exe to always run on Nvidia Graphics Card.
- Run the game in safe mode.
- Setting video quality in game option whatever you want. In my case: set max everything.
- Quit game.
- Edit unnamedsoldier.cfg in game folder/main/configs and add to the bottom:
seta r_customwidth "1280"
seta r_customheight "720"
seta r_mode "-1"

Run the game.