Cylum’s manifesto (now lost to time) allegedly stated a simple goal: "Every game must match the original cartridge’s checksum as if you had bought it new in 1994."
The Ultimate Throwback: Exploring Cylum's Curated Sega Genesis ROM Set cylums sega genesis rom set 2014 new
Cylum famously released the set with a simple .nfo file that read: "This is my last set. If you want future accuracy, do it yourself." And then he vanished. Cylum’s manifesto (now lost to time) allegedly stated