also has a limited number of "Blanks" which can be used to delete all enemy projectiles in a room. Combat is heavily reliant upon memorizing patterns of enemy behavior, and using both cover and dodge rolls to avoid bullets. The Gungeon is made up of five different floors, each having roughly twenty rooms inside. The layout and rewards of each level are procedurally generated from a number of pre-created rooms, and are inhabited by bullet-shaped enemies called Gundead. To defeat Gundead, the player must use a wide variety of guns and items; they can be obtained by unlocking chests or through shops and boss fights. As players slay enemies, they obtain in-game currencies called bullet casings and keys; the former can be spent at shops in exchange for guns, and the latter can be used to unlock chests. Obtained guns can range from conventional pistols and rifles, to more exotic firearms such a unicorn horn that fires rainbows or a mailbox that shoots envelopes. Each level ends with a random boss that must be slain to advance to the next floor. Similar to other roguelikes, Enter the Gungeon has a permadeath system; If the player dies, they lose all items and guns obtained on a playthrough and must start again at the first floor. As the player progresses through multiple playthroughs, they may encounter non-player characters (NPCs) inside the Gungeon. Once encountered, NPCs either set up shop inside the Gungeon, or travel to the Breach, a hub world. At the Breach, the player can unlock new items that randomly generate inside the Gungeon, or can talk with NPCs to accept services and quests. Both actions involve spending an in-game currency acquired from defeating bosses, with unlocked guns increasing the weapon options available on a playthrough. Development Development on Enter the Gungeon started in 2014, with four Mythic Entertainment employees leaving the company to fulfill their own project just before the company would shut down later that year. According to developer Dave Crooks, he had been listening to the soundtrack to the game Gun Godz by Vlambeer, and the name "Gungeon" came to him the next day. Crooks presented the name Enter the Gungeon to his fellow team members, and they created the game's lore over a lunch meeting. They then spent the next few weeks developing prototypes of the game mechanics. Though Crooks stated that The Binding of Isaac was