The right moment i set foot on this floor, the fps dropped around 20, making the game for me unplayable. Aside from this area, the fps range was between 40-60, something I already ddin't like at first, as despite an old rig (970 gpu + i5 2500 3.00 ghz) it's still doing it's job pretty fine, even more so considering that a game like this should not be so demanding.

As anyone else encountered and issue similar to mine?

PS: I was already looked on the steam forum page and tried the devs workarounds, but none of them worked.

I haven't really tried that, as the devs stated that some mobs have broken animation with that option, but the problem seems related to that specific floor. the moment I switched to another floor the problem has gone.

I just hope this issue will not happen on any third floor of a new dungeon...

I opened Task Manager and went to City Streets : Floor 3.

Usually, Mary Skelter: Nightmares takes up 25% of my CPU and 300 MB Memory.
Floor 3 took up 35% of my CPU and 350 MB Memory.

Reasons behind this are - of course - it being an affordable port and therefore lacking optimization. Floor 3 is also the first floor where you'll notice blood splatter - whoch takes me to my last reason - due to the intense amount generated after defeating the Core and the Nightmare..

A later dungeon will be much more demanding It's an intense mini-dungeon and, unfortunately, it will probably lag on you.

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I've been using the Animation switch and the game runs smoother now. Prior to activating it, enemy animations appeared to be very choppy - as if the game was hardlocked into a lower FPS. With the switch on, the animations are fluid and wonderful.

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Finally, play the game without Galaxy on in the background. Galaxy takes up as much CPU and Memory as Mary Skelter on my PC. I dont think yours could tolerate that.

Oh, and check out your performance by opening Task Manager (control +alt +delete) and using its setting Always On Top while playing.Its helpful.