Changes

*Kega Fusion is a very good emulator with high compatibility, coded by an ex-sega staffer! It is easy to use as well, good interface and plugin based filter support too.

*Regen is also very good with high compatibility. Lacks 32X and Mega CD support.

*GenesisPlusGX is too also very good with high compatibility. The only thing it lacks is 32X support which is no big loss considering the few games available for the addon. The port for RetroArch adds shader support, dynamic sync and the other features of RetroArch.

*Exodus is cycle-accurate, and has VERY high system requirements. It is the newest Genesis emulator, and is likely far from complete. It currently only supports the regular Sega Genesis and no other systems.

*GENS, while having many iterations, is still a very good emulator and very close to Kega Fusion but still has issues. Depending on which version you get your experience will differ quite alot.

*BlastEm aims for cycle accuracy but for lower system requirements. It is very early in development however.