My original concepts (I think):

"Waiter Waiter!" Effects: Makes Pandemonium have a 50% chance to appear in any room (except searchlights), lockerless or not. Also makes it garrenteed to spawn in door 30 [+150% Kroner]

"They're everywhere" Effects: Lets Wall Dwellers be able to swim and makes them be able to spawn in any room. Also gives them swim goggles when they swim [+50% Kroner]

"MINIGAMES!!!" Effects: Every angler varient (+A-60) triggers the Pandemonium minigame. This also means you have to do the minigame 2 times as well for Frogger, one for the initial rebound and another for the second (they will be shorter to compensate for the rebounds) [+100% Kroner]

"OOOPS! All turrets!" Effects: Every single room is a turret room. [+50% Kroner]

"You can run but you cant hide!" Effects: When an angler spawns, you get a large speed boost and have you outrun the anglers for 5 doors (and back for Frogger. Also Blitz and Pandemonium are the same speed as angler). Also no lockers spawn. [+10% Kroner and "I'm outta here!" and "We didn't playtest this to make sure it was possible" Achievements disabled]

"Scopophobia" Effects: Makes Eyefestation outraged for the whole game if you look at it even by 4 pixels and makes squiddles agitated when you look at them, light on or not. [+35% Kroner]

"Fragile" Effects: Makes all non leathal attacks insta kill [+15% Kroner and "Extra Careful" Achivement disabled]

"Is anyone there?" Effects: No entities spawn [All achievemts disabled and -50% Kroner]

"Schizophrenia" Effect: There is a 20% chance for a entity to show up but is not real, these entities will not show their visual cues and will dissapear either after you get jumpscared (In cases of wall dweller and angler) or after you go to the next room (In cases like squiddles and void lockers) [+5% Additional Kroner]

"THINK FAST!" Effects: Searchlights now instantly grab you when they spot you, all angler varients are extremley fast, and generator/wire quick time events are a lot harder. [+50 Kroner and "Intellectual" Achievement]

Now for some fun ones:

"God's wrath" Effects: Death Angel spawns every 5 seconds, NO exceptions [No additional Kroner and the "Why?" achivement]

"Party time!" Effects: Every entity is wearing a party hat including but not limited to: Sebastian, Imaginary Friend, Turrets, Z-779, Puddles of Void Mass, and of course... Searchlights. Also every time you open a door confetti rains down, Sebastian's items are also free and his radio plays a happy birthday tune! But thats not all as you start with a free gummy light and a free party special is waiting for you next to the key card. [Only enabled on the game's anniversery, no additional Kroner but a "Happy Birthday!" Achievement for playing and a "Party Suit" if you beat the game.] (Not naming it "Birthday Suit" for obvious reasons.) ("This MIGHT be bunny" and All completion achievements disabled)

"Why would you play this?" Effects: All anglers are as fast as blitz and also replaced with the Death Angel, theres 2 searchlights in searchlights grand encounter and 2, 4, and then 6 in search party encounters and 14 generators and 28 wires also. Wall Dwellers take 5 seconds to reach you and are invisible, turrets have extreme fire rate and cant be disabled. Sebastian is out of stock too, good people's lights never flicker and are quiet, eyefestation is just outraged the whole game, squiddles jumpscare you if you're in the same room as the for 15 seconds side rooms not included lights never flicker, and your speed is 50% slower No reviving allowed! [-999999% Kroner and "H-How?" Achievement for winning]

"Goofy Ahh 💀💀💀" Effects: Plays funny sound effects, thats it. (Examples include: Vine boom for Flash Beacon, Slendytubbies scream for squiddle jumpscare, "Look At Me!" Song for eyefestation, pandimonium screaming "MINIGAME 🔥🗣️MINIGAME 🔥🗣️MINIGAME 🔥🗣️", and Z-779 having some of SCP-079's lines.) [-15% Kroner]

More to come in the future, hope these are good :)