Under Video Controls -> Video Driver I can only choose "Software Renderer (8)", "Software Renderer (16)" or "Default OpenGL". Shouldn't there be a 3dfx option (which I need to use nGlide)???

Yes, i have the same problem, and it was working before...

i don't know if is caused by latest patch...

tested also with renaming sin.exe to quake2.exe but no success

edit: https://www.gog.com/forum/sin_gold/cant_use_glide_wrapper_anymore

i think that i will use software rendering... (this game was done for that originally...)

also HUD was done for 640x480 resolution...

i have tested now software rendering mode with 640x480 in-game, scaled to 1280x960 with integer scaling mode (dgvoodoo2) and works fine