Well, besides Isaac, there was Abraham, his father, and "the angel of the LORD."

The game "The Binding of Isaac" can be purchased from a number of sources. For example, Amazon, Steampowered, Steamcommunity, and Gaming Stack Exchange all carry this game.

Nerdy Nummies - 2011 Binding of Isaac Cake 1-30 was released on:

USA: 21 August 2012

A ram was sacrificed instead of Isaac in the biblical story of the Binding of Isaac, as a test of Abraham's faith.

The ethics within the binding of Isaac falls into theological voluntarism. This means that we are to take whatever is endorsed by god to be good such as when god asks Cain and Abel for tribute and the sacrifice of livestock. So when god wishes Abraham to kill his son Isaac, Abraham is all too willing to go ahead with the sacrifice without question.