Halo 3 Epsilon

Halo 3 Epsilon is an internal-only Halo 3 build.

It was released to Microsoft employees as of August 10, 2007, and featured Campaign (both single-player and cooperative gameplay) on the level Tsavo Highway, as well as Forge and multiplayer on six maps: Epitaph, High Ground, Last Resort, Sandtrap, Snowbound, and Valhalla. .

Halo 3 Epsilon was confirmed to some degree later on August 10th 2007 by Bungie Studios on a Bungie Podcast. Microsoft employees, Xbox.com representatives, and the Bungie Studios staff have been playing it, and Bungie employees used this build to finish the final details of the game. It was over on the 29th of August 2007, when Halo 3 went gold.

An anonymous US gamer using the gamertag "Scar" managed to unwittingly download Halo 3 Epsilon. He played the game with his console connected to Xbox Live and quickly came to the attention of Microsoft. In September 2007, his gamertag and console account were banned until December 31, 9999, resulting in the longest ban from Xbox Live ever.

Outside Sources
Guinnes World Records Gamer's Edition 2008