A new beta of UT was found recently. It was actually an old leak that got re-discovered. I'm waiting until gamesharder makes a full post about it with everything mostly, I did not have time to play it myself but somebody is making videos at the moment and it is really exciting. It is not unfortunately a beta that will show the intermediate and better flakcannon that was once developed, however this is right after the unreal add-on phase and still is mostly it. It is version 221. It doesn't run the maps by default you will need to setup paths to the 222 beta or so or copy files over as it is lacking textures. It is newer than the version reviewed by dan toose and already has ut male soldiers in it too. It has a new ripper model too, otherwise all the weapons have unreal models still, except for the translocator/redeemer/impacthammer/chainsaw/pulsegun but those were already developed for the addon. It has an unused ut health pickup that is a crystal with the plus symbol in it.
There are several maps never seen in Unreal or UT before and some of them come from the developement of the epic singleplayer level pack, but converted/adjusted to DM. dm twilight is also in its original before fusion pack form, as that map came from UT and not the other way around.
Frigate was also present in deathmatch only version not just assault btw and is a little bit different. Unreal textures are still mostly everywhere but already some effort was made to introduce new ut ones, so its not so unreal-like like some even earlier screenshots show. Some maps are missing like Rook, which around the time had skaarj statues and some extra geometry but we only saw this on an old screenshot.
There is a map that is a combination of like dmhealpod and dmsplash, well not exactly but contains features from both which makes me think that dave ewing probably made splash apart from other cut unreal maps and not Inoxx. Inoxx told me he didn't remember making splash, there was another cut dm level he made instead that had a different name and that was Ketzen. Ewing made a lot of maps and I think even for original Unreal just we never saw them. I know that some packs/conversions credit Inoxx for Splash but it is incorrect, the original map had no credit assigned, just like Nexus, which was actually by Inoxx (and not cliff like .:..: thought).
The beta also features that voice over found in the 222 beta files, this time with scrolling text over the rotating u logo, so no cityintro shenanigans but this instead...
and it features an interlude from a miner and also xan kriegor himself, at this point not robotic at all, just sounding all human.
And it is all very OW THE EDGE too.