But Ultrakill is... Ultrakill.
Also it takes a LOT of skill and effort.
A better way to summarize it tho:
It's retro style, but without the limitations of old consoles. It's like the old DooM, but with better graphics, cool plot + lore, "style points", and just a very cool game!
If you are just getting into Ultrakill, I suggest checking out a VA know as Gianni Matragrano, he has a YT where he makes plenty of memes, including Ultrakill ones, and that's bc he voices the main antagonist of the game, Gabriel.