Basement Survivors

Play The Binding of Isaac: Repentance by Vampire Survivors' rules. Solo.

• Every floor is one big arena. Basement → Caves → Depths → Womb → Mom's Heart, each a real big room from that floor of your Isaac.
• Survive the horde. That floor's own Isaac monsters come in growing waves for 5 minutes.
• Your tears fire by themselves at the nearest monster. They're Isaac's real tears, so every item still works. Press a shoot key to aim yourself.
• XP gems and level-ups. Monsters drop Vampire Survivors' gems. Each level-up freezes the horde and puts down 3 real Isaac items: take one.
• Elite monsters (Isaac's champions) drop a chest that opens into an item.
• Then the floor's boss (Monstro, Peep, Monstro II, Blastocyst, Mom's Heart) and its boss item, then a real Devil or Angel room with Isaac's own deals, and a trapdoor down. Beat Mom's Heart and open the big chest to win.
• Any Isaac character, from Isaac's own character select.
• Vampire Survivors' music and sounds (Mad Forest, Inlaid Library, Dairy Plant, Gallo Tower; gem, level-up and treasure sounds) and its gems come from your own Vampire Survivors install.

Needs The Binding of Isaac: Rebirth with Repentance and Vampire Survivors installed. Only changes normal runs: Greed mode and challenges are left as they are.

Credits: The Binding of Isaac by Edmund McMillen and Nicalis; Vampire Survivors by poncle. Each player's own copies supply their content. The helper uses libogg/libvorbis (Xiph.org, BSD), UnityPy (MIT), python-fsb5 (MIT) and Pillow.