via http://www.aep-emu.de/

Yamagi Quake II is an enhanced client for Quake II.

Quote:
On 09/03/2012 Quake II 5.00 was released. Changes since 4.21 are:

- Backport to Microsoft Windows.
- Support for OpenBSD. (by Jonathan Gray)
- Aspect ratio can be set via the video menu.
- A better random number generator.
- The SDL sound driver is now selectable by "s_sdldriver".
- Fix a crash while diving when using the SDL sound backend.