Might help to explain some context for people who don't know what Overdrive 2 is, or why it's important.
TiTAN is a pretty prominent group in the demo scene. They do a lot of crazy demos, basically coding consoles to their limit while making cool audio-visual presentations. Overdrive 2 is the follow up to the original Overdrive demo[1], and once again TiTAN have pulled off a bunch of insane effects on the Mega Drive.
Overdrive 2 is relevant to /r/emulation because it can't be emulated (yet). From what I understand, it's doing a bunch of tricks (described in the write-up on Google Docs) that emulators currently can't handle. That's right, even in 2017, Genesis/MD emulation has a ways to go, which is kind of exciting to me. I'd love to see emulators like Blastem, Exodus, and higan step up to the plate. Then maybe the demo scene can come up with even more torture tests ;)
Anyway, you guys can catch Overdrive 2 over on YouTube.[2] This stuff is sick.