It's rare we get a Sonic hack that actually manages to get finished, and with 5 years of development, Hellfire Saga definitely delivers. The visuals are definitely stand out in this hack. Obviously the characters clash but it creates a fitting sort of dissonance to me, as Sonic isn't supposed to belong here. I love the level aesthetics, particularly Sin City. The bosses are cool and creative, even though I call BS on how to defeat some of them. In particular, the Final Boss is a bit of a letdown, I found it to drag and the gimmick for it wasn't very fun. Despite that, I say Hellfire Saga is a pretty fun hack for those looking for a challenge.