Increases the number of hearts you get during an interaction.

Potentially used in secret ending, currently unknown still searching. I imagine it is for a secret ending that needs a high heart stat.

You get +5 Smarts when you purchase this.

You get +5 Boldness when you purchase this.

You get +5 Creativity you when you purchase this.

You get +5 Fun when you purchase this.

You get +5 Charm for purchasing this.

You get -2 Charm and -2 Smart for purchasing this.

If you have this on you when Vera plans to become prom queen; you get the option to do blood magic. If done successfully and you have high enough stats you get the Vera Prom Queen secret ending.

If you purchase this you get the Perv! achievement.

If you buy the blanket you need to trick everyone into thinking you’re a real ghost (expect Liam). Then go to prom by yourself or if you have the right stats any of the main six charaters to get your a ghost secret ending.

This gets you the Boo! achievement and is one of the ways to get Good on my own achievement if you go by yourself.

If you buy the corpse you need to make sure everybody else thinks it trendy and cool. Then go to prom by yourself to get Corpse prom date secret ending.

This is one of the ways to get Good on my own achievement.

Prove your love of erotic dragon fan fiction to everyone, then go to prom alone to get staying at home reading, instead of going to prom secret ending.

Purchasing this mask gives you -4 Smart +2 Boldness +2 Creativity +4 Charm +4 Fun.

Polly may bring up wanting to try the Reverse Romanian Wilkinson, you need the mask for this. After buying the mask, you need to successfully get some guacamole from Liam (in an interaction). Choose to go to prom with Polly and if you have high enough stats you will get the sexy Polly secret ending.

Purchasing this gives you -7 Smart +4 Boldness +4 Fun.

The Wolf Pack convince Scott that cocaine is a new kind of sports drink, after Scott does coke you need to calm him down. Unfortunately for Scott being high on coke will unsurprisingly get you kicked off the sports team. Scott come to you for help, to help him you need to have the bag of cocaine from the store and convince coach (in an interaction) that cocaine is good for you. Choose to go to prom with Scott and if you have high enough stats you will get the sexy Scott secret ending.

This is used to get a secret ending for Vera.
Convince everyone you’re in the cult, then figure out Vera runs the cult. Ask Vera to go to prom with you and if you have high enough stats you can get the sexy Vera secret ending.

Alternative: go to prom by yourself to get Good on my own achievement.

Care and protect your new pal Zgord. Make sure you have high charm stat, so you ask Zgord to prom instead of it destroying the world in your last interaction. Then go to prom by yourself to get the Zgord prom date secret ending.

Doing this you receive the Love from the depths achievement.

After you buy the greeting cards you will meet Blobert. Blobert being the helpful angel he is will sugest that you should help Polly and Scott get away with murder, by give ethier a corpes or Principal giant spider a very specific greeting card.
Blobbert will come to you saying Vera needs help to get away from the Wolf Pack and Interdimensional Prince, stop them harassing Vera by making a paper plane with a card or giving a card to the prince.
Finally the Slayer will try to once again attack Liam and Damien. Blobbert suggests giving her a card to make her think otherwise.
Then go to prom by yourself this will give you the Blobert secret ending.

Doing this you receive the wowie achievement.

After you buy Arcane Floppy Disk, go to the library to use it. Scott and Damien will want to play the game on the floppy disk which upload a virus to the computer, Damien will then want to destroy the computer with the virus on it and you need to do something to stop him.
Principal Giant Spider introduces you to a new exhange student Calculester. It's important that no one finds out that Calculester is a robot, becuase the school is full of roboacists and will kick Calculester out of school.
Calculester and a group of your friends are talking about what you what you like about living, you tell him what makes you feel alive.
Finally the wolf pack "figures out" Calculester is a robot, you must convince them otherwise.
Then go to prom by yourself to get the Calculester secret ending.

Doing this you receive the 01101001 00100000 00111100 00110011 00100000 01110101 achievement.

After buying Angel Blood, the Coven will tell you they need it to save the world. Surprisingly this time you want to help them, so you must convince Polly and Vera not to use it to get high/feed to her hair snakes.
It turns out a super amazingly good looking vampire Dimitri steals the angel blood from the coven, and you have to get it back from him by seducing him or giving the coven a confidence boost.
Finally a demon attacks Joy (the coven leader) and you must save her by crying over her or giving her an orb.
Then go to prom by yourself to get the Joy from the coven secret ending.

Doing this you receive the Enter the Coven achievement.