Quake2Plus makes the following improvements to Quake 2:

Machine gun recoil disabled in single player *
Added support for 1280x1024 screen resolution
Stopped blank taskbar icons when switching resolution
Inhibited shadows from dynamic objects (e.g. weapons fire and explosions)
Smoothed edges of dynamic light effects
Stopped dynamic lights shining through walls
Added hardware gamma ramp support
Added stencil shadow support

* This feature is only available for the single player game of Quake 2, i.e. it will not work for any mods/add on packs. It requires a manual copy of the gamex86.dll file from the Quake2Plus directory to the baseq2 directory. This will make all previous save games invalid! It is strongly recommended that you make a backup of the original file.