Streets of Rage 4 DLC Mr. X Nightmare, free update announced for 2021 - Polygon

Streets of Rage 4’s Mr. X Nightmare DLC will add new characters (including former boss Estel Aguirre), a new survival mode, and new moves for existing characters. A free update is also coming with new difficulty options.

Streets of Rage 4 (2020), Switch eShop Game

Best Streets Of Rage 4 Posts - Reddit

Dominic's Indie Picks Of 2021. A bad year for Earth, a great year for…, by Dominic Tarason

Updated Re-release - TV Tropes

Streets of Rage 4 and Mr. X Nightmare DLC Patch Notes

Co-Optimus - News - Streets of Rage 4's 'Mr. X Nightmare' DLC AND a Free Update Are Here

Dominic's Indie Picks Of 2021. A bad year for Earth, a great year for…, by Dominic Tarason

Dominic's Indie Picks Of 2021. A bad year for Earth, a great year for…, by Dominic Tarason

Streets of Rage 4's first major DLC arrives July 15, lets you whack goons with a swordfish

Streets of Rage 4 + Mr. X Nightmare DLC: Major Update Available for Free - Dotemu

Streets of Rage 4 Mr. X Nightmare DLC launches next week