Thank you conductoid, this is for running Call of Duty United Offensive via wine:

Code:
MESA_EXTENSION_MAX_YEAR=2003 force_s3tc_enable=true __GL_ExtensionStringVersion=17700 WINEPREFIX=~/.wine wine CoDUOMP.exe +set r_ignorehwgamma 1 +exec fps.cfg
(previously it would start into the start menu, while crashing after loading a map)