Chrono Trigger: Crimson Echoes felt like a proper sequel to Chrono Trigger to me. It was a fan developed ROM hack of the original Chrono Trigger and it was made by the fans at Chrono Compendium. You might have heard of it because it received a Cease and Desist.

I watched a proper playthrough of it on YouTube a year or two ago and it was definitely worth the time. It felt a bit like fan fiction sometimes, but the fact that it uses the original game really helps its case. If that game had come out much closer to the release of the original game, I think it would be as liked as the original.