After getting the Hotel Hell badge in Roblox Doors, I wanted to go higher than 150%. So I started attempting with 15 total modifiers. I would've had Nowhere To Hide in the list of modifiers I used, but it was way too difficult. So I replaced it with Bad Ventilation, and it only took me a few attempts after that.
Here's what each modifier does:
Electrical Work: Lights never flicker or break. This includes entity warnings.
El Goblino's Payday: No gold can be found. This means you won't be able to buy anything at Jeff's shop midway through the run, making it useless.
Key Key Key Key: Almost every door is locked, requiring a key to unlock.
Bad Ventilation: Covers the hotel in fog, limiting your vision.
Last Few Breaths: Reduces your maximum HP to 50.
Bad Time: Makes most entities more active.
I'm Runnin' Here: Rush moves faster, meaning you have less time to react to his audio cue.
Back For Seconds: Ambush is more active. (I believe this stacks with Bad Time. Correct me if I'm wrong.)
Afterimage: Ambush moves faster. Just like with the modified Rush, you have less time to react to his audio cue.
Watch Your Step: Snares will occasionally spawn throughout the hotel.
Nosey: Eyes spawn much more often. (Again, I believe this stacks with Bad Time.)
Battle Of Wits: Dupe spawns much more and is locked to maximum difficulty. Eyes and Keys will spawn near the correct door most of the time.
Roundabout: Halt is guaranteed to spawn and is more difficult.
Rent's Due: Hide will kick you out as quickly as possible. Timing your hiding is crucial.
Soundproofing: Pickup items will not emit a shimmering noise.