This is a main menu preview of the latest version of the Delta Halo UI before its developers delayed it indefinitely. This isn't really a final version since they haven't officially canceled the project, but nobody appears to be working on it anymore.
This version uses the original Halo 1 main menu BSP (Installation 04 - Alpha Halo). Some older versions used different BSPs.
Developers: Jcap, Timo, Boba, SnaFubar, Conscars, and Teh Lag