The forum thread was a frenzy. "Cylums is a hoax." "I got it, but the Sonic Crackers prototype is just a renamed ROM of Flicky." "He's asking for a sacrifice—a ROM he doesn't have."
This suggests the set includes base games, homebrew, unlicensed games, and hacks. cylums sega genesis rom set 2014 work
It prioritizes the best version of a game (usually the US release), removing hundreds of duplicate entries from Europe and Japan. The forum thread was a frenzy