...PIXELFORMAT 10 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
----- CL_Shutdown -----
RE_Shutdown( 1 )
-----------------------
GLW_StartOpenGL() - could not load OpenGL subsystem

...WARNING: fullscreen unavailable in this mode
...setting mode 9: 1600 1200 FS
GLW_StartOpenGL() - could not load OpenGL subsystem
See the linked RtCW guide inside that ET guide
https://steamcommunity.com/sharedfiles/filedetails/?id=2800337841

...WARNING: fullscreen unavailable in this mode
...setting mode 9: 1600 1200 FS
GLW_StartOpenGL() - could not load OpenGL subsystem
See the linked RtCW guide inside that ET guide
https://steamcommunity.com/sharedfiles/filedetails/?id=2800337841

i Fixed apperantly the game could not handle that resolution

I don't think there's much screens supporting 1200 height nowadays ^^"

I highly recommend you use ET: Legacy since it has better support for newer GPUs.

Excepted AMD until they fix their drivers, but recent feedback seems to tell they're working on it