Portal: Project-Beta

Portal: Project-Beta is a total-conversion mod designed to recreate Portal as it appeared in its 'Beta' state. As such, many game assets have been replaced or redesigned to match the look and feel of the Beta. For instance, Chell is replaced with an unknown male character, and Half-Life 2 models are used to decorate the Relaxation Vault.

To date, development on the mod has been restarted at least once resulting in two distinct but similar modifications each bearing the name "Project-Beta". The initial mod was created wholly from scratch, taking inspiration from developer commentary, presentations, official trailers, and featured a bonus testchamber based on the ExcitE mod for Half-Life 2: Deathmatch. The later, now more widely available, features content from Valve itself and is made from early .vmfs (the file format of Valve's level editor), unused audio and scripts.

History
Portal: Project-Beta began development in October of 2008 and was not "finished", despite being "released." It had two demos; the first demo was released February 8th, 2009, and the second, released as a standalone mod called Portal: Project-Alpha, was released on October 11th that same year. The final version of the initial Project-Beta was released December 26th, 2010, but was considered to be "incomplete and...UNFINISHED". Two years later, in May of 2012, the download links on ModDB were removed (due to being 'inactive') and the mod was effectively canceled. On September 29th, 2016, a new version of the mod was suddenly released on the same ModDB page using different content; not recreations, but official maps, sounds, and textures that remake the 2006 iteration of Portal's development.