Arcade



Arcades are special rooms that can only spawn on an even-numbered floor ( II, II,  II,  II) or an XL floor if you have 5 coins or more when you leave the previous floor. Arcades require one coin to be opened. They can be replaced with a Vault if Isaac is carrying two keys or more.

An arcade can contain:
 * A Slot Machine, a Shell Game, and a Blood Donation Machine
 * Two Blood Donation Machines, a Beggar, a Devil Beggar, and a Key Master
 * A Slot Machine, a Blood Donation Machine, and a Fortune Telling Machine
 * A Donation Machine and a Blood Donation Machine
 * A Beggar, a Shell Game, a Devil Beggar, and a Blood Donation Machine
 * A Slot Machine, a Donation Machine, and a Blood Donation Machine
 * A bed, a Key Master, and 3 hanging dead Shopkeepers.
 * Donation Machine, 2 Blood Donation Machines, 3 Fortune Telling Machines, and 4 Slot Machines.
 * Crane Game machine, a Shell Game, and a Blood Donation Machine

In addition, the Arcade usually also has one or more random pickups on entry.

Layouts
The odds of the following machines/beggars spawning in any given Arcade are:
 * Blood Donation Machine: ~68.23% (13.1/19.2)
 * Slot Machine/Shell Game: ~57.81% (11.1/19.2)
 * Fortune Teller: ~5.73% (1.1/19.2)
 * (Devil) Beggar: ~15.63% (3/19.2)
 * Key Master: ~10.42% (2/19.2)
 * Donation Machine: ~11.46% (2.2/19.2)
 * Crane Game machine : unknown

Trivia

 * The posters that can appear on the arcade's walls are pictures of games that Edmund McMillen has worked on, such as Gish, Super Meat Boy , and Time Fcuk.
 * In the original Binding of Isaac, the arcade's icon was a 6-sided dice. In Rebirth , this icon was changed to a joystick.