This game is looking for some odd extension after creating a core
context such as ARB_vertex_program and EXT_framebuffer_object.
Rather then enabling these in core this forces the game to use
compat. This allows the game to run and seems to work without
issues. All other id tech games/engines use a compat profile.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>