DarkRP Universe

The DarkRP Universe, also known as the Non-Canon Universe/Timeline, is a loosely structured patch of spacetime where non-canon, crazy bullshit and other assorted fuckery happens within the multiverse. See also, Mohammad Allah.
== Actual relation to Chloe Hill ==
In some way or another, it could be assumed that the DarkRP Universe exists within the same multiverse as Chloe Hill, meaning that iterations of Chloe could canonically appear within the bounds of the DarkRP Universe. However, this has yet to properly happen and the legitimate, physical boundaries of the DarkRP Universe remains undefined.
At present, the DarkRP Universe appears to rather be a "patch of spacetime" where the normal limitations of existence are bent or nullified entirely. It's a Twilight Zone-esque dimension that lacks proper scientific explanation, but simply exists. 
So yes, Chloe could theoretically exist here, but if that happened, it would run the risk of Chloe breaking the fourth wall and realizing her status as a fictional character within Garry's Mod (and other media), which could corrupt the entire roleplay - hence why the DarkRP Universe is, for the most part, considered non-canon to Chloe Hill proper.
=== The Combine ===
Indeed, within the canon of the DarkRP Universe, Combine technology and the Universal Union itself does exist. As for whether or not the DRPU Combine is the same/has knowledge of the Combine from the normal RP, remains unknown/unwritten. Considering the Combine is multidimensional, it's plausible it could be the two same Combines. It's simply unknown right now.
Category:DarkRP Universe