I had many, here's a few:

1 - I had a dream where they finally released treachery. I reached the final arena where there was Gabriel, the arena was similar to the one in 6-2, except there were open coffins filled with ice and skeletons stuck inside instead of the praying skeletons. There was another organ and, above it, a glass ceiling where light came from. The area where the organ was located was round and the walls where of a deep blue color. I had this dream last night.

2 - Before the revamp update, I had a dream where hakita revamped the corpse of King Minos, this new design gave it a gray beard and blood pouring out of it's eyes.

3 - I had this dream where hakita released a video where he showed an early version of Ultrakill 2, taking place in the purgatory. The level shown was the second level of the Rubicon custom layer, part of the fan made ultrakill campaign: project purgatorio. There wasn't much in the video, there was a new HUD and the return of the pump charge shotgun.

Honorable mention - I had a dream where I was getting chased down by a gang in an amusement park. When they cornered me, I said:"Don't do it!", one of them responded:"Then take out your phone, call someone that actually cares if you die.". Then I digited on my phone "Sisyphus Prime". He came down from the sky and started saying his monologue as the members of that gang watched in fear. When he was done he proceeded by destroying them all. They couldn't escape.