Avoid cheap Bluetooth controllers – input lag will ruin dodging.

: Includes on-screen dual joysticks optimized for mobile.

Independent developers have attempted to fill this gap with unofficial Android ports.

The Android port is based on The Binding of Isaac: Repentance —the massive final DLC that doubles the game's content. This means you are not just getting the original 2011 Flash game. You are getting over 700 items, 34 playable characters (including Tainted variants), 20+ bosses, and the alternate "Home" path.

You cannot download this from the Google Play Store. The process is deliciously old-school: