This article is non-canon.
The subject matter of this article does not take place in the "real" Half-Life universe.
LEGO Dimensions is a toys-to-life video game developed by Traveller's Tales and published by Warner Bros. Interactive Entertainment released in September 2015. It features worlds and characters from many different franchises, including Portal 2 (Half Life is also hinted in the Portal campaign).
On the planet Foundation Prime, in the center of the Lego Multiverse, Lord Vortech and his former minion X-PO seek the twelve Foundational Elements, the cornerstones of time and space itself scattered across the dimensions long ago, in a attempt to merge all the universes into one under his control.
Vortech's own body cannot handle too many more dimension jumps, forcing him to open vortexes to thirteen different worlds, recruiting villains to aid in his search for the Elements.
When Robin, Frodo, and Metalbeard are each pulled into the vortexes, each in possession of one of the Elements, Batman, Gandalf, and Wyldstyle all jump in after them.
Aided by X-PO, the three use a vortex generator to travel through worlds within the multiverse to search for the five missing keystones that power the generator and the Foundational Elements, hoping to find their missing friends and stop Vortech's plan from succeeding.
- After the credits, GLaDOS sings a new song called "You Wouldn't Know."
- Chell is a playable character and comes in the Level Pack A Portal 2 Adventure.
- During her boss fight, GLaDOS is distracted by H.A.L. 9000 from 2001: A Space Odyssey; GLaDOS, not knowing who he is, asks if the Black Mesa Research Facility sent him.