The Binding of Isaac Four Souls Expansion Pack Strategy Card Game The Binding of Isaac: Four Souls+ 2nd Edition Expansion Pack, Enhanced Backgrounds & 1 4+ Players Game Walmart.com So the Binding of Isaac has this card game, and I thought why not make an expansion based on Hollow Knight! This is only what's been made in this project's first 48 Amazon.com: Maestro Media The Binding of Isaac: Four Souls: Requiem Expansion 250+ New Cards, Characters, Monsters, Room Deck & Game Modes for Kids & Adults, Ages 13+, 1 4 Players, 60 Min Playtime : Video Games Bleedzone Expansion The Binding of Isaac: Four Souls Requiem Expansion Zatu Games