The Binding of Isaac: Rebirth

The Binding of Isaac: Rebirth

79 Achievements

1,520

680-1000h

Xbox One
Xbox Series
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The Womb

The Womb

Kill Mom.

20

37.05%

How to unlock the The Womb achievement in The Binding of Isaac: Rebirth - Definitive Guide

Update: Game had a patch on the 11/11/2015. All achievements should now be unlocking as intended.

This achievement is unlocked by beating the Depths 2 for the first time. Mom isn't a particularly hard fight, but there are a few things you can do to make it easier:

1. If you come across it, the bible is an instant win item against this boss, making the fight very easy.
2. Watch out for the shadow of mom's foot. Her stomp does a lot of damage but leaves a big opening to getting some damage in yourself.
3. Keep away from the doors in the arena, Mom can attack you through them and there is very little chance to dodge the attack.
4. Keep the enemies clear as they spawn. Getting overwhelmed will cause you to make mistakes. Ontop of this, some of your attacks will pass by to hit Mom as she spawns in enemies. That said, there seems to be a limit to the amount of enemies that can be spawned at once. If mom happens to spawn in enemies that avoid you in the corner, leave them.

As long as you take your time and don't get careless, Mom is a fairly easy fight. Once the achievement is fixed, beating her on a new save will unlock it. No idea if it will retroactively unlock for those of us with it already done however.
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24 Jul 2015 04:17

31 Comments
It's completly glitched... I've tried this boss "for the first time" like 10 times by re-download my save and nothing poped...
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By WhiterValkyrie on 25 Jul 2015 21:49
Unfortunately you'll need to wait till it's fixed :(

Essentially just wait till the game updates and see if that fixes the achieves.
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By Sakori on 25 Jul 2015 23:55
Definitely bugged. Currently at 6 Mom's Heart kills which means I've killed Mom at least 6 times.
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By The9thChevron on 26 Jul 2015 08:56
I just unlocked this by killing Satan as the lost on hard mode.
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By So many Bears on 26 Jul 2015 09:58
Strange... If the glitched achievement pop while doing an other action, it will be cool !
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By WhiterValkyrie on 26 Jul 2015 11:24
Welp, that's certainly one way to do it.

Lost hard mode is needed for real platinum god I believe, so at least it fits in trying to 100% things.
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By Sakori on 26 Jul 2015 13:04
Makes me wonder if using the lost on any other hard mode challenges also adds missing achieves. We have three missing (boss rush, dark room, chest) and three more hard mode areas that would need completing (dark room, chest, cathedral). They could in theory line up.
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By Sakori on 26 Jul 2015 13:20
Well I've done the lost all the way thru the dark room and boss rush on hard and nothing else popped apart from beat unlock the womb. I intend on doing the chest on hard in the next few hours as the lost so if anything else pops that shouldn't I'll post here,
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By So many Bears on 26 Jul 2015 13:28
I went all the way thru the chest as the lost and nothing else popped, so it looks like the other achievements are still glitched.
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By So many Bears on 27 Jul 2015 09:01
shame, here's hoping when the fix comes that they pop based on previous completion.
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By Sakori on 27 Jul 2015 12:01
Tssss i won't start that incredible game on my principal account till it'll be fixed...
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By WhiterValkyrie on 27 Jul 2015 15:29
of all the achievements to bug out...
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By redjarman on 28 Jul 2015 01:14
I can confirm that killing Satan with The Lost on hard mode unlocks this achievement although I assume it is not working as intended
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By Cilisien on 29 Jul 2015 22:18
Awesome, thanks on the confirmation. Congrats on completing a path as the lost!
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By Sakori on 29 Jul 2015 23:48
Also figured I might as well join you :p
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By Sakori on 30 Jul 2015 01:16
So, just to verify.. this is supposed to be be unlocked after beating her leg the first time, right ? Cause yeah, I just did that, and haven't gotten to the womb yet. Is it supposed to unlock PRE-womb?
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By Wheaty4L on 08 Aug 2015 04:22
It's SUPPOSED to unlock literally the first time you see the credits roll
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By redjarman on 08 Aug 2015 04:46
Ok gotcha, thanks. Looks like we're just gonna have to wait for a patch. Wonder if they've announced one yet?
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By Wheaty4L on 08 Aug 2015 06:33
I know the creator has been working on patches for all the new versions, but unlike on Steam where he can just update the game whenever he wants, on Xbox he has to wait for Microsoft to approve it.
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By redjarman on 08 Aug 2015 16:36
Ahhh, ok I see. Well as lame as that it is, at least we can have some peace of mind knowing it's coming, smile
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By Wheaty4L on 08 Aug 2015 18:55
You don't need to beat Satan with the Lost ON HARD. You only need to beat him with the Lost.
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By KEYMAKER99 on 09 Aug 2015 23:34
To basically get it you do the exact same thing as "The Mind" achievement. Do that and you will unlock both achievements.
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By KEYMAKER99 on 09 Aug 2015 23:43
Yeah, but all of The Lost's unlocks are for beating on hard mode so you'll likely be playing that way anyway. Unless he changed it for console release
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By redjarman on 10 Aug 2015 05:24
I just got the real platinum god achievment. There are 4 bugged achievments...

challenges
boss rush
dark room
chest room


all the other ones should unlock eventually
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By paolop11 on 12 Aug 2015 21:27
Yep, seems to be the case from what everyone else has unlocked too.

If I could just find stephen and/or bandage girl I'd join you. >.>
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By Sakori on 13 Aug 2015 02:09
Best I can tell they've been pretty distracted on afterbirth.

The 3ds has been through two patches since launch (the initial patch completely ruined the game).

My assumption would be we'll see the fix with afterbirths console releases.
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By Sakori on 18 Oct 2015 13:44
This just unlocked for me whilst playing another game...guess it has been patched.
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By Chunkeh Munkeh on 11 Nov 2015 14:02
Yuuuup me too I was playing MCC :]
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By Spay001 on 11 Nov 2015 14:04
Confirmed, thanks for letting me know guys.
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By Sakori on 11 Nov 2015 14:44
Thanks for the update, I would guess the achievement is just popping with incorrect flags.

I heard rumours that the ps4 version also has issues with achievements unlocking, yet people have hit platinum on that. So in theory everything should be possible.
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By Sakori on 26 Jul 2015 14:26
Is the dev working on a patch? Is anyone knows? I've tried searching on google and Edmund Mcmillen tweeted the 24 of july that the patch was waiting for approval (on 3DS and Xbox ONE). Is this has already been made of we are still waiting for Microsoft? I'ts like 3 months later now..
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By alex1sqc on 18 Oct 2015 13:43
View all 31 comments Show less comments
Defeat Mom for the first time
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14 Jul 2023 00:00

The womb must first be unlocked by defeated Mom once. After it is unlocked every subsequent run will now go through The Womb I and The Womb II. The achievement is supposed to unlock after completing The Womb II and killing Mom's Heart.

Thanks to Cilisien for the work around: this achievement is obtainable by beating Satan with The Lost on hard mode. 

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