Have a Intergrated Intel Card (G45/G43 - OpenGL 2.1) had to use "MESA_GLSL_VERSION_OVERRIDE=150 MESA_GL_VERSION_OVERRIDE=3.2 ./start_RimWorld_openglfix.sh" in terminal (cd to game directory) to get the game running. I don't suppose anyone knows how to translate that to be used in steam's launcher options for the game? Tried entering it as is and with the full path to the sh file. Also tried putting the "MESA_GLSL_VERSION_OVERRIDE=150 MESA_GL_VERSION_OVERRIDE=3.2" part after them as well and still no luck. :/