It's a light version of DSC (Quake III Arena demo player) with Point Release 1.32 compatibility. Look at the context menu for demo files. Double click a demo to play it. Convert a dm3 demo to the dm_48 format. Open the properties window of a demo, save demo and player descriptions (only dm3 and dm_48 demos for now). Switch Q3A version manually via shortcuts. Plays all Q3 demo versions up to dm_68