Forge is a level editor developed by Bungie and 343 Industries for the first-person shooter video game series, Halo. Forge was initially released alongside Halo 3, and was further expanded upon in Halo: Reach, Halo 4, Halo 2: Anniversary, Halo 5: Guardians, and Halo Infinite. Upon Halo 3'''s release, Forge received critical acclaim for its ease of use and versatility. Bungie subsequently released multiple maps designed for Forge editing in both Halo 3 and Halo: Reach. As of 2019, over 6.6 million user-created maps have been created using Forge. Function In Halo 3, Forge is an in-game map editor designed for adjusting weapon, vehicle, and prop placement. While in Editor Mode, the player becomes a floating robot, or "monitor", who can spawn, move, and delete any game object on the map. All objects are assigned a monetary value, and cost money to spawn; the level's "Forge budget" determines how much money the player can use to spawn objects. Unlike conventional level editors, map geometry can't be moved or deleted in Halo 3 Forge, but props (such as crates and concrete barriers) can be used to create makeshift walls and blockades. Later updates to Halo 3 added DLC maps specifically designed for Forge editing, with expanded prop lists that allow players to create rudimentary maps out of blocks, slopes, and panels. The Halo: Reach iteration of Forge received multiple new features, such as the ability to phase objects through one another, suspend objects in mid-air, and adjust object placement in finer increments through "nudging". These additions were later back-ported to Halo 3 in an update to Halo: The Master Chief Collection. History Development on Forge began only 6 months prior to the launch of Halo 3; according to Bungie producer Allen Murray, multiple "small UI features" had to be cut to accommodate its inclusion. Forge was first unveiled in August 2007 at the Leipzig Games Convention.Halo 5: Forge, a free standalone version of Halo 5s map editing tool, was released for Windows 10 on September 8, 2016. In August 2019, 343 Industries transferred over 6.6 million Forge maps created on the Xbox 360 versions of Halo 3, Halo: Reach, and Halo 4 to Halo: The Master Chief Collection. Forge was left unimplemented for the 2019 Windows release of Halo: The Master Chief Collection, but was later added with Halo 3'''s launch in July 2020. With the release of Forge on Windows,