Super Mario Multiverse

The project began as a personal hobby for Neoarc, who wrote the engine's code from scratch. For years, it was famously difficult to access, operating on a "scouting system" where players had to prove their skill and community activity to earn a spot in the closed beta.

, which goes far beyond what you might find in official Mario Maker titles. Navigation to instantly switch between editing and play-testing.

In 2020, a large-scale writing project titled the "Super Mario Multiverse" was hosted by The Well-Red Mage