'Fortnite' staged an entire Marshmello concert inside the game

Fortnite is a video game, a meme machine, an occasional subject of controversy, and now... a concert venue.

Marshmello set up shop on a virtual stage set up inside the game on Saturday. He was there to perform, and that's exactly what he did. The proof is all over social media.

Fortnite maker Epic Games treated the whole thing like an actual, real world event. Construction work on the stage began earlier in the week, as players discovered when they ventured into the Pleasant Park section of the game's map and visited the football field found there.

It took a couple days.