For a small and reasonably-priced DLC, Mr. X Nightmare brings a lot to the table. Not only does it add a new mode with a decent amount of depth, but three new characters and a lot of other small changes. Streets of Rage 4 was already an incredible game and a worthy successor to the iconic franchise, but Mr. X Nightmare has made so many refinements and tweaks that it has raised it to the level where it has surpassed them. All it took was adding one key factor - replayability.
Omno provides a great escape from this suffocating world we live in today through its complete absence of any gloom and doom. Jonas Manke a.k.a. StudioInkyfox initially created this passion project as an escape on Kickstarter, and it really does deliver. Just be sure to play this game on a platform that doesn't just fulfill its minimum requirements-I had the misfortune of installing it first on a PC that was so choppy and laggy I couldn't even make the shortest jump across two platforms.