Have a 100% save tip we missed? Let us know in the comments below, and remember: to reach the future, you must first travel to the past.

For decades, Sonic the Hedgehog CD has stood apart from its Genesis counterparts. With its time-travel mechanics, stunning anime intro, and the elusive "Good Future" scenarios, achieving true 100% completion is a rite of passage for dedicated fans. But let’s be honest: replaying Zone 3 of Wacky Workbench five times just to find that one hidden Metal Door projector can be tedious.