The Binding of Isaac: Rebirth achievements
2,721
(1,155)

The Binding of Isaac: Rebirth

4.7 from 467 votes

There are a maximum of 65 The Binding of Isaac: Rebirth achievements (58 without DLC) worth 2,721 (1,155)

7,411 tracked gamers have this game, 172 have completed it (2.32%)

Achievement Details

Secret Achievement in The Binding of Isaac: Rebirth

Secret Achievement26 (15)

Continue playing to unlock this secret achievement. (Secret)

  • Unlocked by 2,433 tracked gamers (33% - TA Ratio = 1.74) 7,411  

Achievement Guide for Mom's Knife

AuthorSolution
SuperSonicDelux
263,024 (128,145)
SuperSonicDelux
Achievement won on 24 Jul 15
TA Score for this game: 2,396
Posted on 24 July 15 at 08:28, Edited on 23 March 16 at 01:18
This solution has 5 positive votes and 0 negative votes. Please log in to vote.
Well first things first you have to play as Isaac.

To get to Satan, you must kill moms heart; and If you killed moms' heart enough times or a devil room shows up, you go down into Sheol. Once you get to Sheol it's like all other floors just find your way to the boss room. When you get to the boss room, you will be fighting a 3 phase boss fight, You start by Fighting the Fallen, then you fight Satan, then you fight Satan's feet. After you kill the final phase just walk up to the chest and you get your Achievement.

As far as tips go... I can't give much, but if you've made it to Sheol, and have enough a good amount of hearts you should be fine. I beat Satan on my first try, Was it luck, mostly, but this game has a lot of RNG, So I hope you get as lucky as I did
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