Epic Games released a fully meshed Deathmatch level called Underland with the new Unreal Tournament build. This level is designed for 6 to 8 players who fight across a hidden outpost, once lost for a thousand years, that guards the entrance to the massive Underland caverns.
To learn the difference between the prototype shell and the final meshed level, look at these the before and after screenshots.
1
2
3
4
5
6
7
8
Also in the new build there are 8 new Blue Star offline challenges, four in Underland and four in Chill.
You can also check out all of the release notes for the new build here.
Source: Epic Games