| This minifigure has only appeared in video game(s)|
Although this article is about an official minifigure, it never existed in physical form or appeared in any official LEGO sets.
While the Builder has never been released as a physical minifigure, its head, torso, hip, and leg designs are nearly identical to pre-existing Space droids such as Major Kartofski and Ann Droid. Unlike these other droids, the Builder has a unique Black and Dark Stone Grey color scheme.
In 4850307 LEGO Battles, Builders work for the Astronauts as Builder units of the Earth Command army. They carry a pickaxe, which is used to harvest Energy Crystals. They construct all of the astronauts' structures and buildings. The Builder has 1 strength, 150 life, and 2 speed, and costs 45 bricks to build. As Builder units are crucial to building bases and harvesting Energy Crystals, Builders are playable in most Earth levels.
In the Wizard Final cutscene, the Builder is accidentally spawned by the Wizard while trying to resurrect the Sorceress. In the Earth Act 2 cutscene, the Builder and a Trooper are interrogated by the Space Police Captain about Plisken's whereabouts; the Builder is immune to the Space Police Captain's memory-wiping device, so he shuts it down instead. In the Earth Final cutscene, the Builder appears among the Earth army as they celebrate victory over the Aliens.
In unlockable concept art, a Builder and a Trooper are depicted in "Earth Picture 1" looking up at a star-filled sky. Two Builders and two Troopers also appear in the "Earth Scene 2" concept art, which has also been published as a promotional render for the game.