From Halopedia, the Halo wiki
This article is about the original Blood Gulch in Halo: Combat Evolved. For similar maps, see Blood Gulch (disambiguation).
Blood Gulch is a multiplayer level in Halo: Combat Evolved. It is set in an enclosed, symmetrical canyon with a base at either end and an open field between. The level supports vehicles and is recommended for 4-16 players. The map is almost entirely devoid of life, save some sparse grass and bushes. Blood Gulch is easily the most famous multiplayer level from Halo: Combat Evolved, and while its simplicity and size have contributed much to its popularity, the biggest factor to Blood Gulch's fame is the fact that the popular machinima series Red vs. Blue is set in this level.
Universe and lore
Blood Gulch takes the form of a desert canyon on Installation 04. The area is one of many examples of the Forerunners' tendency for repeated designs, with similar such canyons also known to exist on Installation 05 and Trove The UNSC believe that the almost-identical canyon found on Installation 05 may have once served as a site for young Warrior-Servants to prove their combat prowess.
Blood Gulch's layout is quite simplistic; it is set in a vast canyon, with two bases, a huge open field with hills and ditches, and caves and cliffs along the rock walls. In addition, there are teleporters located on each base's roof; each will transport players to the center field. Blue Team has the advantage of utilizing a ledge near Red Base which is an ideal spot for sniping while Red Team has the advantage of surprising the Blue Team via tunnel access located on the side of the map.
Blood Gulch was remade into Coagulation for Halo 2, with the bases excavated to provide more room, as well as a number of other minor differences, such as the addition of a Banshee to each base, but it still very much remains the original map. The Blood Gulch concept was later reworked into Valhalla for Halo 3, featuring a similar size and layout, but with dramatic changes in the terrain and the base structures. Standoff has been called another Blood Gulch successor, given its similar terrain, but features a different layout. A map called Blood Gulch was included in Halo Wars, and is somewhat accurate to the original, though it lacks the caves, since it would be hard to implement, as the game is a real-time strategy game.
Blood Gulch has also been remade for use as a multiplayer map variant for Forge World in Halo: Reach. It was revealed in a special episode of Red vs Blue. The bases are ported from Blood Gulch, while the terrain geometry is a direct port from Coagulation, and the general setting of the Forge World map resembles Valhalla. In Halo 4, Valhalla was remade into Ragnarok. In Halo 2: Anniversary, Coagulation was remade into Bloodline.
The following achievements can be unlocked on Blood Gulch on Halo: The Master Chief Collection.