ViDoc

"ViDocs" are video documentaries created and released by Bungie and later by Ensemble Studios, showcasing a particular feature in an upcoming game, that run for roughly seven minutes (except for Journey's End). These videos give players insight into the creative development processes involved in the progress of Halo 3, Halo 3: ODST, more recently, Halo: Reach.

Contrary to popular belief, ViDoc does not actually stand for "video documentary"; it is a Bungie-created combination of the words "visual", "informational", and "documentation". Most ViDocs have a title in Latin that is somehow related to the content of the videos. Other ViDocs reference famous quotes, such as "Once More Unto the Breach" and "On the Seven7th Day...". These ViDocs contain interviews of various Bungie employees working on that aspect of the game in question, and a great deal of game footage.

Released Vidocs

 * Halo 3 ViDoc: Et Tu, Brute?, on the subject of Halo 3 ' s Brutes.
 * Halo 3 ViDoc: Is Quisnam Protero Damno!, on the subject of Halo 3 ' s multiplayer features.
 * Halo 3 ViDoc: Cinema Paradiso. on the subject of the Replay feature as well as the Forge editor.
 * Halo 3 ViDoc: Journey's End, released just after Halo 3, this Vidoc was intended to fill the gap for people new to Halo.
 * Halo 3 ViDoc: Mapmaker, Mapmaker Make Me a Map, a ViDoc focusing on the Legendary Map Pack.
 * Halo 3 ViDoc: And on the Seven7th Day..., a ViDoc explaining Bungie Day and the release of Cold Storage.
 * Halo 3: ODST ViDoc: Desperate Measures, a ViDoc focusing on Buck and his squad.
 * Halo 3: ODST ViDoc: Bip. Bap. Bam., a ViDoc focusing on Halo 3: ODST ' s Firefight game mode.
 * Halo 3: ODST ViDoc: Terra Incognita, a ViDoc focusing on the development of Halo 3: ODST.
 * Halo 3: ODST ViDoc: Dramatis Personae, a ViDoc focusing on the development of the cinematics and characters of Halo 3: ODST.
 * Halo 3: ODST ViDoc: Road to Recon, a ViDoc that focuses on giving tips and strategies for the Vidmaster Challenges.
 * Halo: Reach ViDoc: Once More Unto the Breach, a ViDoc focusing on the graphical and gameplay changes in Halo: Reach.
 * Halo: Reach ViDoc: Carnàge Carnivàle, a ViDoc focusing on the Multiplayer features of Halo: Reach.
 * Halo: Reach ViDoc: Forge World, a ViDoc showcasing the new level: Forge World and all of its features.

Other ViDocs
In addition to the ViDocs released by Bungie Studios, there are four other ViDocs which were released by Ensemble Studios in weeks leading up to the release of Halo Wars.

Halo Wars ViDocs

 * Halo Wars ViDoc: Halo Times Ten, a ViDoc describing the difference between the RTS game Halo Wars and the other FPS Halo games.
 * Halo Wars ViDoc: Expanding The Arsenal, a ViDoc on the subject of the Spartans featured in Halo Wars.
 * Halo Wars ViDoc: Strategy on Xbox, a ViDoc explaining the Halo Wars game controls.
 * Halo Wars ViDoc: Jaws of Victory, a ViDoc focusing on in-game tactics.