From Halopedia, the Halo wiki
In 2525, the Eridanus rebels used several robotic forklifts in the cargo holds of their supply freighters, such as the Laden, to carry and transport crates. These forklifts moved automatically and ensured that crates and other items did not come loose during slipspace transits.
The S-2 forklift was used by civilians on the planet Reach, and can be seen in many locations, including the Visegrád Relay, ONI facility Sword Base, civilian settlements, and the ship breaking yards in Asźod. S-2s are also in the New Mombasa Data Center. During the Battle of Earth, the S-2 was used by UNSC Marines to organize various objects in the military base Crow's Nest. Numerous S-2s were abandoned in Traxus Factory Complex 09 during the Battle of Voi.
During colonial rebuilding efforts in the years immediately following the Human-Covenant war, Traxus introduced the lighter "SL" range of their cargo transporters and found enormous commercial success. The SL-4 model became a favorite among businesses large and small across dozens of colonial worlds.
In Halo 3 and Halo 3: ODST, it is a scenery item. It can be found on many levels, both in campaign and multiplayer, and is a Forge object. It was never seen doing its duty, as its civilian operators had either evacuated or were killed by the Covenant.
Along with other civilian vehicles, the Forklift was made drivable by the player in Halo: Reach and appears in several campaign levels as well as the Firefight map Courtyard. However, it is much slower than in all the other game's vehicles, and lacks the speed to even splatter a Grunt. The only exception to this when if the enemy in question is sprinting or charging, otherwise they will merely be pushed aside. This slow speed, coupled with its exposed canopy and lack of any kind of weapons, makes the vehicle largely useless in gameplay. However, it is extremely explosive and, when positioned properly, can act as a player-placed fusion coil within the campaign - an aspect which can be taken advantage of. Weapons like the Concussion Rifle are also able to push it around, making it into its own projectile. The Forklift in Halo: Reach originally had the ability to raise and lower, but it was cut due to being "crazy and pointless", more specifically, it had a physics glitch that would launch models in a high speed and height. It was also planned to be featured in Forge, but was cut.
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