Cut Halo 5: Guardians levels

During the development of Halo 5: Guardians, a number of levels and maps were cut.

UNSC Infinity Hub
"Above is an early space I prototyped with the talented RJ Ranola (That’s his geo you’re seeing in the background there). We mapped the area out from above, using the resulting proportions to flesh out the interior. Shon Mitchell built a functioning version of that door at the top.  Patrick Hammond may have also been involved.  No piece of AAA game art is a one-person deal, and much of what gets done early-on can (and most likely will be) rewritten."

- Concept artist Paul Richards discussing the production of this level.

The UNSC Infinity Hub was a planned "weapons down" campaign mission for Halo 5: Guardians that was cut during production.

Tsunami Station
The level known in development as "Tsunami Station" would later go on to be named Battle of Sunaion in the final game. Early drafts for the level had the mission split into two levels; one focusing on Blue Team and one focusing on Fireteam Osiris. Each level would have been slightly shorter than the one featured in the final game, and both would have featured the Arbiter fighting as an NPC, with the Locke mission showing him fighting in out-of-bounds zones. These iterations of the levels did not progress far into gameplay prototyping, and as such blockouts posted by level designer Jayce Diaz lack proper combat encounter zones.

An early level layout for the Tsunami Station levels was to feature Banshee gameplay inspired by Halo 2.

Multiplayer maps
A number of very early Halo 5: Guardians multiplayer map prototypes can be found in the files of the leaked Halo 4 tags build, alongside many cut Halo 4 levels. They can be signified by the file prefixes  - shared by the map filenames in the final Halo 5: Guardians build and presumably standing for Next Generation (referring to the then-upcoming Xbox One console).