http://bugs.winehq.org/show_bug.cgi?id=11970
--- Comment #70 from Roderick Colenbrander thunderbird2k@gmx.net 2008-04-17 01:03:22 --- The code I added to wine's opengl was to match the behavior of windows opengl32. Our code behaved differently. In short there is a list with pixel formats and wine tried to find the best match while windows returned the first format which met the specified requirements. The format which is returned depends on the way the pixel format list is sorted. For nvidia the first compatible format supports depth/stencil on both windows and linux.
On a intel card on neither of the OSes the first compatible format doesn't offer depth/stencil. I expect the same bug in serious sam on windows using an intel card. It really is a bug in the game.