Adding the game to your wishlist will notify you the second the price drops.

New items, trinkets, and "Mother" and "Beast" final encounters that provide the true conclusion to Isaac's story. The Risks of "Free Download" Sites

For those interested in experiencing The Binding of Isaac: Repentance on PC, here are the steps to download the game for free:

Repentance relies heavily on daily challenges and online leaderboards, which are typically disabled in pirated versions.