http://bugs.winehq.org/show_bug.cgi?id=7585
--- Comment #42 from Andrew Charles Hurst a.hurst@shef.ac.uk 2008-06-18 13:06:43 --- Yes, commenting out those calls (leaving 'GLCheckCall's), the game engine can run, and I can esc to the in-game menu and back to engine fine. No hang.
The in-game and startup menus are not drawn, however.