In this page will be listed all known or rumored Oddworld Beta versions. Here will be videos and download links for them possibly.
NTSC-J (Demo): SLPM_80175
Abe A Go Go Trial Demo. It's basically similar to Abe's Oddysee PC Demo being pretty finished unlike two other demos.
Video: Even Earlier Prototype probably from GameBrain TV show.
Note: While the video was titled "Possible Abe's Oddysee Late Beta" this is even earlier build than the August 6th Beta)
NTSC: Oddworld: Abe's Oddysee (Aug 6, 1997 prototype)Â (Late Prototype)
First submitted Oddworld: Abe's Oddysee Prototype on Hidden Palace by Heyitsleo. Huge applause to Heyitsleo !
Some PAL Demos including whole Necrum Mines in very early beta.
Found from Euro Demo 38 and Registered Users Demo 6 atleast.
Station Demo Disc 2
Includes Abe's Exoddus Demo with QuickSave, Abe's Oddysee Demo
NTSC-U (Demo) on Official U.S. PlayStation Magazine Demo Disc 17 (Mega.nz Mirror)
Has also Abe's Exoddus demo with Quicksave. Also few starting differences to earlier demo above
Early Beta Version (Given by Sergei)
The most early prototype version of Abe's Exoddus submitted originally by Sergei.
Has the most crashing risk and pretty differences in later levels.
Late Beta Version (RUS Dubbed)
Russian dubbed Late Beta version found from psxplanet.ru
Other Late Beta Version Ver 02
Even later build probably really close to final now with minimal to no differences.
Video: Early Tech Demo of Munch's Oddysee (PS2)
Video + Download: Munch's Oddysee Demo (Xbox) by Sgabbit
Video: Stranger: Wrath of The Wild (Stranger's Wrath Prototype Version)
You can find some beta variations of game trailers from Oddworld Inhabitants YouTube. :)
Caddicarus was said to play early version of the Train Hijack level but according to him it wasn't too different. (As i call him saying on his video, could be wrong)