Fan puzzle, free to play, no account, no paywall. It costs a little to run — domain, hosting, and the hours that go into writing hints — and there are two ways that gets covered.

☕ Tip jar

Entirely optional. Helps with the domain and hosting.

Buy me a coffee

📢 Ads

There are now a few ads on the site to help cover the expenses: a small one in the corner, and occasionally a full-screen one you can close right away. Never between hints, never during a guess. If one ever blocks the puzzle, use the Report a problem button and I'll fix it.

📜 Fine print

• Fan project, not affiliated with Edmund McMillen, Nicalis, or official Binding of Isaac.
• No paid features, ever. Everything in the game is free for everyone.