Special Rooms

The Shop is a special room that appears at the end of every world (except for Droids HQ), meaning it appears every ten rooms. It is a room that has no hostile enemies. If there are two or more players, all players will heal 25 otherwise the player will heal 50 .In the room stands a Friendly Droid behind a counter, commonly referred to as the Shopkeeper, with 4-5 different items on it. The items can be bought for circuits, with their price depending on which world you are currently in. Shops in later worlds sell items for higher prices.

If 3 shopkeepers are killed, subsequent shops will not have a Friendly Droid, instead only the helmet of a Friendly Droid will be behind the counter.

All shops have a red button at the furthest left corner (for the Altar and Atomic Factory shop, it is behind the altar). This button functions as a ready up button and will teleport all players, as well as player corpses, Anti Droids and certain items to the next world when a certain amount of people press it. it WILL teleport a box to next world,only if its inside the special room area, otherwise it won't. The amount varies depends on the amount of players alive.

Shop 1: General
This varient will always be the first shop (unless there’s certain crown challenge rules). The two left-most items will be weapons, while the two right-most items will be consumables. Purchasing an item will swap the item with another of its category (i.e. Weapons swap with weapons and consumables swap with consumables) but it is possible for the same item to be sold multiple times in a row. Berries will not be sold in this shop, except through the Berry Bag, a consumable which gives 2-5 random berries. On the left wall (from the perspective facing the counter), a tip/trivia is displayed.

This shop has a brown color scheme.

The music playing in this shop is Ember, by Kubbi.

Shop 2: Laboratory
This variant of the shop will have a cauldron. The first item from the left is a weapon, while the second item from the left is a potion. The two right-most items will always be berries.

The cauldron allows players to create potions using the berries they have. The Accrue and Fervor berries are able to create a Potion of Healing. in the 1.3 update, all cauldrons can only make 2 potions before having its water depleted, but in 1.5, it has been buffed to 3. it's also important to choose which potions you are going to make. On the left wall (from the perspective facing the counter), A guide on how to brew potions is displayed and a random potion's recipe.

This shop has a gray color scheme.

The music playing in this shop is Cascade, by Kubbi.

Shop 3: Forge
The Forge is one of the two special rooms that were added in the 1.3 update, the other being the library.

This variant of the shop will have an anvil in the middle of the room. The Forge will have 5 items on the table. The 2 leftmost item is a weapon, the second item is a utility item, and the two rightmost items are gemstones, which are used to upgrade swords, but only when an anvil is present. which can only be found in the forge room. To upgrade a sword, you first hold out your sword and move it to the anvil, which will automatically place down your chosen sword. Then you repeat the process but this time with a gemstone. This causes the sword to be upgraded with whatever gemstone you used.

A sword cannot be upgraded twice (exception is brass sword) and some swords can't be upgraded at all. On the left wall (from the perspective facing the counter), It's displayed on how to use the anvil. The shop has a similar color to the generic shop, however the floor texture is brick-like.

The music playing in this shop is Firelight, by Kubbi.

Shop 4: Library
The Library is the other special room that was introduced into the game in the 1.3 update.

The Library is a special room that also has 5 items laying on the table. The 2 leftmost item is a weapon, the second item is a Mana Spell, which is always free, and the other two items are tomes. Tomes are the only way any other class besides the wizard and elementalist can gain spells. However, the tomes can only be used in a library, except for the Lost Tome, which will give you a random tome without the library condition. The Lost Tome doesn't appear in the library as it is not considered a tome, but rather a consumable. After buying the Mana Spell, it is replaced with the Tome of Mana (unconfirmed), which will give you 20 mana when used, but only 10 if you don’t have mana spell (and gives a mana spell)

If you own a spell and use its tome, it will convert itself into 10 more mana instead of granting duplicate spells.

The Library has bookshelves instead next to the walls. The special room also has a brown color scheme and this special room, alongside the Ritual Altar doesn't have signs on the walls.

The music playing in this shop is Compass, by Kubbi.

Shop 5: Ritual Altar
If you've killed 3 shopkeepers and beat The Darkness, there is a chance of a shop being replaced by a Ritual Altar. Cultist heals an additional 25 upon entering and leaving the Ritual Altar. Three items are sold in this shop. The bottom item is always a weapon, while the other upper  items are Sins. Instead of circuits, items in this shop are purchased with the player's health, each item costing 50 hp. If you have less than or equal to 50 max hp then it will cost your max hp - 1. The cost of Sins can only be lowered to 40 hp this way.You cannot purchase the items if you do not have enough health. The altar will never be encountered if darkness isn't triggered. The altar can be encountered multiple times in the same run.

This shop has a dark color scheme. Eerie music also plays when the player encounters this special room.

Shop 6: Respite's Shop
As of the 1.3 Update, Respite has its own exclusive shop. This shop showcases the signature spinning rune seen in Null, alongside the altar seen in the Ritual Altar, but recolored. On the altar, the sword Wrath is sold for 666 HP, and it is the only item sold there. Upon pressing the button behind the altar, the screen blacks out and a glitchy noise plays, and after a bit of a pause, you're sent to Sandy Canyon, and the game resumes.

Before 1.3, however, this shop used to look like a more traditional Generic shop. However, it would sell items for 0 Circuits, with the price going up by 666 Circuits if something was bought. Weapons in the shop were the starter weapons, and a powerful sword named Wrath that costed 666 circuits in price, which could instakill anything but was unobtainable through practical means. The shop also had a unique Droid only seen in it, a shopkeeper resembling the Friendly Droid but with no face and a garbled name.

Shop 7: Atomic Factory's Shop
As of 1.5, Atomic Factory now has its own shop. This shop will always have the same items (the leftmost item is medkit, the second leftmost is the bomb, middle is singularity sword, second rightmost is heart container, rightmost is fast forward), and items do not get replaced when sold or a recycle bin has been used on them. All items cost 100 circuits except for singularity sword which doesn’t cost circuits.

This is the only shop to sell the Singularity Sword.

This is the only shop to have a free sword.

Vault
If you complete a world quick enough, or take no damage, you will get this special room.

You will be in a grey room with yellow stripes at the bottom of the wall. A table will be presented with 4 items to choose from, along with a red button that opens up the shop after you click it. All these items are free. However, you can only choose one of them as they all disappear after choosing.

It is unknown how fast you have to complete a world to get this room, however I estimate it’s around 30 seconds, which can be increased to about 45 with raider’s second ability.

The Golden Circuit is guaranteed to appear as the rightmost item.

Vaults that appear after the Darkness has been cleared are guaranteed to contain a sin.

Trivia

 * According to an in-game trivia, certain runs may 'specialize' in either Laboratory, Forge or Library, but it is not uncommon to encounter all three types in one run.
 * Atomic factory’s shop and libraries are the only shops to have guranteed free items.
 * The shop is referred to as a "special room" by the game. An example of this is in the description for the Mobile Phone consumable.
 * The World Number of the shop is the same as the world number of the world the shop is in.
 * Killing the shopkeeper does not affect the price of items on sale.
 * The music in the Laboratory and the Library seem to intertwine together, where the last part of the Laboratory’s music sounds similar to the first part of the Library’s music, and vice versa.