How do I unlock the playable character Judas? As the unlocking requirements are unknown. What exactly are the unlocking requirements?
There seems to be an answer to this in the Steam achievements of the game. First, lets look at a couple of achievemnts that seem to support this guess.
Collect 7+ container hearts in one play through
This is the requirement to unlock Magdaiene. (As I recall it. Could have been less.)
Collect 50+ pennies in one play through
This is almost the requirement to unlock Cain. (The actual number is 55.)
Thus, I feel it's reasonable to assume that the requirement to unlock Judas is connected to the achievement
Judas's Fez Complete the full game
What exactly this means, I do not know, as I haven't yet beaten Mom.
And looking at the achievements it seems that just beating Mom isn't enough.
to unlock judas you need to kill moms hearth-use we need to go deeper in dephts II or kill mom and the next time you play the game when you kill mom a trapdoor will apear taking you to the womb. The best way to get there is to search every room, give money to beggars or blast them to increase the chances of meeting the devil