MegaZeux 2.83 + Caverns of Zeux
The underlying program used to play and create all MegaZeux games, version 2.83 primarily introduced support for looped OGGs and WAVs, and a new OpenGL renderer, in addition to the usual incremental bugfixes. It comes packaged with the original Caverns of Zeux, a classic promotional game from 1994 still beloved by the community today.