https://play.google.com/store/apps/details?id=jp.konami.epjCastlevania2

Not sure how reproduceable and how long it will stay:

"After you grab the parking pass and the cells open up releasing all the zombies, you run into one of the cells and get yourself cornered. You get a bunch of them into the cell for a giant gangbang fuckfest. After 2 bites and your camera going haywire you get i-frames that don't go away."

https://discord.gg/C66EeTb

Feel free to join discord dedicated to the game, there is a speedrun channel as well.