Special Rooms

The shop is a special room that appears at the end of every world (except for Atomic Factory), meaning it appears every ten rooms. It is a room that has no hostile enemies. In the room stands a Friendly Droid behind a counter, commonly referred to as the Shopkeeper, with four 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 a shopkeeper is killed, or if multiple Friendly Droids 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 shop, it is behind the altar). This button can only be activated by the host and will teleport all players, as well as player corpses, Anti Droid s and certain items to the next world.

Shop 1: General
This variant will have a healing button in it. The two left-most items will be weapons, while the two right-most items will be non-potion consumables, such as healing items or other utilities. 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 a random number of 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 first shop is guaranteed to be this variant. It will have a healing button and will always sell 2 weapons and 2 consumables.

Shop 2: Laboratory
This variant of the shop will have a cauldron instead of a healing button. The first item from the left is a melee or ranged weapon, while the second item from the left is a potion. The two right-most items will always be berries; Accrue berries and Fervor berries will always be the first berries that the player can buy whenever they enter this shop.

Berries are much cheaper than other items 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. However, in the recent 1.3 update, all cauldrons can only make 2 potions before having its water depleted, so it's important to choose which potions you are going to make. On the left wall (from the perspective facing the counter), a potion's recipe is displayed.

This shop has a gray color scheme.

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 and a medkit in the middle of the room. The medkit is free to pick up and use. The Forge will also have four items on the table. The 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 and some swords can't be upgraded at all. On the left wall (from the perspective facing the counter), writte. The shop has a similar color to the Healing Button shop and has a medkit in the center of the room, however the floor texture is brick-like.

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 four items laying on the table. The 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, which will give you 20 mana when used.

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 on the walls and 2 of the 4 bookshelves will have bandages. The special room also has a brown color scheme and this special room, alongside the Ritual Altar doesn't have signs on the walls.

Shop 5: Ritual Altar
If you've killed multiple Friendly Droids or beat The Darkness, there is a chance of a shop being replaced by a special altar. There are two medkits in the room, one on each side of the back of the altar. The medkits are free to pick up and use. Three items are sold in this shop. The middle item is always a weapon, while the other two items are Sins. Instead of circuits, items in this shop are purchased with the player's health, each item costing 50% of their max HP. You cannot purchase the items if you do not have enough health. The altar will never be encountered if no Friendly Droids are killed. The more Friendly Droids you kill, the higher the chance of encountering the altar. 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 sin 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 Healing Button 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 was several hundred 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.

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.
 * 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.