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New Update! - Balance Change

Based on feedback, you can now find an Ultra Secret room by bombing any adjacent red room. This should remove some unnecessary rng.

Remember, you can enable Ultra Secret rooms by clicking the red key outline before starting a game.

Good luck!

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How to Play

In Secret Roomle, your goal is to uncover the two secret rooms on today's floor!

Click any empty space on the map to place a bomb where you think a secret room might be.

If you find both the secret and the super secret room without running out of bombs, you win!

Missed bombs reveal new information about the map such as room types and rocks blocking walls.

Come back every day for a new floor, or try endless mode to practice your knowledge.

Want a challenge? Toggle Ultra Secret rooms by clicking the red key before starting a game.

Tips

The secret room is likely to be surrounded by many other rooms.

The super secret room is only connected to one normal room, and is often close to the boss or shop.

If a rock is on the wall of a room, that means it is blocking a secret room from spawning there.

Ultra secret rooms will always spawn one room away from any normal rooms, with a red room connecting them.

Ultra secret rooms are more likely to spawn where they are connected to over 3 normal rooms via adjacent red rooms.

Ultra secret rooms cannot be connected to a curse room, boss room, or secret room.

For more detailed information about secret room generation, click here

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New Update! - Ultra Secret Roomle

Want a challenge? Enable Ultra Secret rooms by clicking the red key outline before starting a game.

In this mode you must select all secret rooms including the Ultra Secret room to win. Selecting valid rooms adjacent to the Ultra Secret room will also unlock it.

Good luck!

About

I started this project initially as just a recreation of the Isaac room generation algorithm, as I was interested in how it worked behind the scenes. I soon realised it would be really helpful to have a tool to practice my knowledge of secret rooms with, and from there I got the idea of a daily game. This site has both - a daily challenge and an endless mode for practice.

The algorithm should be almost identical to the game, so its a great tool to build an intuition for secret room locations! I hope you have fun with the site, as it was a lot of fun making it : )

If you have any feedback, bug reports or feature requests please dm me on reddit, feel free to check out the github to see the spaghetti code, and if you're feeling generous you can support the site on Ko-fi.

Planned Updates

• Further balance changes to Ultra Secret Rooms
• Customisable generation and seeds in endless mode

Credits

Please note that this is a fan creation, and is not officially associated with The Binding of Isaac or its creators.

Thanks to:

• thelord777 for helping me figure out how to make the frontend look decent!
• isaacle for being the first to do an isaac based daily game, and for giving me inspiration on the look of the site
• The Isaac wiki for details on the level generation algorithm
• boris the brave for details on the level generation algorithm