The most critical aspect of the 3DS version is its hardware requirement: the game is . It cannot run on original "Old" 3DS models. This restriction was due to the original system's inability to handle the game's complex procedural generation and numerous on-screen entities.

Bringing the Basement to Your Pocket: The Binding of Isaac on New 3DS The New Nintendo 3DS version of The Binding of Isaac: Rebirth

If you never paid for Rebirth in any form, consider buying it on Steam or Switch first. Then, if you’re curious about the 3DS version purely for historical comparison, dumping your own cartridge is the cleanest method.

The game is infamous for its difficulty and "roguelike" structure: every run is procedurally generated. When you die, you start from zero. This ensures hundreds of hours of playtime.