Hybrid actually has two prototype builds out in the wild. One from 1995 on December 19th, which is the earliest build, and a second in 1996 on May 14th.
This 1996 build is interesting as it is much closer to the final release. While it retains the early HUD, all of the weapon graphics are basically identical to the final.
Seven of the ten maps from the final release are present here, though only Level 2: Accommodation Level, Level 3: Labs, & Level 6: Halls of Decay are mostly complete.
Level 4: Secret Labs & Level 5: Maintenance Level are very, very incomplete, lacking functionality for things like doors, exit triggers, and whatnot. The texturing hasn't been done yet in a lot of areas, so you'll be seeing the same default textures for the walls and flats, much like in BUILD maps when you start making a new level and the infamous brown brick texture is set as the default texture.
There is another audio track in this build that is used for the main menu, and it is not present in the early builds or final releases.
It's actually a short loop of a small portion of The Prodigy's Firestarter (the Empirion Mix version) and is most certainly intended to be a placeholder track.
Post will be edited and updated as needed.
You can find the prototypes here:
Psalm 69 (Dec 19, 1995 prototype)
Psalm 69 (May 14, 1996 prototype)
