Re:Huzzah! (Score 2, Informative)

Unfortunately, it is quite risky to develop and market a downloadable (under 15mb or so) Windows game using OpenGL, at least for the time being. A significant portion of the marketplace has computers that do not have working, hardware-accelerated OpenGL drivers. [1] They have decent enough video cards, ones that have reasonable OpenGL drivers written for them, however they haven't been installed. Furthermore, Windows Update does not seem to update one's OpenGL stack. This has caused a lot of downloadable developers to either use the better supported Direct3D API, or stick to software rendering (with DirectDraw, and more increasingly, with SDL.) [2]

[1] Reflexive attempted to use hardware-accelerated OpenGL in their downloadable game, "Wik: Fable of Souls", however they switched over to full software rendering after encountering numerous driver issues. More information on this can be found in the game's postmortem, available at: http://www.gamasutra.com/features/20050214/hallam_ 02.shtml . More info on using OpenGL in downloadable games can also be found on the http://indiegamer.com/ message board.

[2] PopCap's framework uses both Direct3D and DirectDraw-based software rendering.