Entering the Basement - W.I.P.

Gungeon in Isaac

The Binding of Isaac: Rebirth, rewired by Enter the Gungeon's rules. You play a real Isaac run — real basement, real tears, real bosses — but Gungeon's arsenal is in the mix:

• 3 guns as Isaac actives — Rusty Sidearm (3-round burst), Magnum (heavy, slow), Derringer (small, huge damage). Ammo = charge pips, refilled when you clear a room.
• Blank — a classic Gungeon blank: wipes every enemy bullet on screen and shoves enemies back.
• Casings — Gungeon's casing spin rides on basement pennies (the coin economy is untouched).
• Bullet Kin & Shotgun Kin — they walk in where Gaper, Pacer, Globin, Horf and Host used to, with Gungeon chase-and-shoot AI.

How it works (and why you need both games)

Nothing from Enter the Gungeon ships with this mashup. On first install Melty runs a small converter that reads your own Enter the Gungeon install and turns its sprites into Isaac-format animations, then the Isaac mod loads them. You need to own both games on Steam; the mashup plays through Isaac.

Under the hood

• Host: The Binding of Isaac: Rebirth (vanilla Repentance+ Lua mod — no loaders, no Repentogon needed).
• Gungeon content: converted at setup from your local install (converter: Python runtime, UnityPy, Pillow).
• Solo play.

Code license: MIT. Remixing this mashup is allowed and encouraged.