This is a time attack of CastleVania Bloodlines for Genesis on the Expert difficulty. You can unlock expert by entering the classic Konami code at the title screen. This makes you do less damage to enemies and bosses, and also there are more enemies for you to fight. I used Eric Lecarde and didn't take any damage throughout the entire game. The total time is 31:39

Bisqwit: Unless it's intentional that you die in the first boss of the game, your movie desyncs on me and I can't watch it.
I'm using the ROM stated in your submission, md5sum is 0f04fc1b5bf8c9a887abcf14ce96b0cd. The emulator version is 2.12a, the same which I've been using all the time.

Phil: Personally, I think it should be refused. There's so many errors in this video and GENS is not the best emulator to emulate this game. I think we should wait a better version of this emulator to plublish any movies of this game. Btw I will not do a speedrun of this game until a better version, GENS, is released.

Dan_: I don't know why it doesn't work for you, Bisqwit. Check Jyzero's solution and try that out. Anyways, I canceled it because after watching through it, I know it can be improved a bit more. So that goes on my ever-growing list of projects.