The Binding of Isaac: Rebirth

The Binding of Isaac: Rebirth

637 Achievements

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1001%

1001%

Nerd x 1000000

19.2%

How to unlock the 1001% achievement in The Binding of Isaac: Rebirth - Definitive Guide

If you have achieved this or any of the other Afterbirth achievements before the patch that added them in, you can unlock them by going to STATS and then SECRETS.

To get this achievement, you will need to get all 276 SECRETS, complete all 30 CHALLENGES, and pick up all 438 ITEMS. Many of the SECRETS are co-op baby unlocks, so you will have also have to get a full completion card on HARD with every character.

You will likely pick up the majority of items just trying to fill in all of your completion cards, but if you're like me and are missing one or two items at the end, there's a decent chance that they're Devil or Angel room items. The easiest way (at least for me) to grind those out was to play GREED mode as Isaac. Play every wave on every floor so you'll always get a Devil/Angel room and if you don't see the item you need, just roll your D6 and you get a second shot.

If you have any questions, let me know, and I'll happily try to help you out!
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26 Jun 2016 13:05

11 Comments
It isn't 436 items ?
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By WhiterValkyrie on 30 Jun 2016 07:38
I'm not really sure why, but there ARE 436 items. But the number that showed up for me and several other people in the STATS page was 438, No idea where the +2 comes from.
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By MoltenPanthar on 30 Jun 2016 07:50
Really strange !

http://bindingofisaacrebirth.gamepedia.com/Item

Really hope, i will not have trouble with this :/ ! I just need 16 (or 18) items left and do all The Keeper hard mark...
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By WhiterValkyrie on 30 Jun 2016 08:03
I've just checked and you're right : there is indeed 438 items !
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By WhiterValkyrie on 01 Jul 2016 12:07
I saved the Keeper Lamb kill for the last thing I needed to unlock 1001%, but the Lamb achievement didn't unlock. Idk what's happening, but I'd stay away from unlocking both of those at the same time.
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By ParticleDuality on 21 Jul 2016 22:12
Just grinded out Godhead for real plat on greed as you said, i found destroying angel statue and rerolling key piece too gives you that once extra small chance of angel items needed.

Now to do everything as Keeper
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By Lewy210 on 11 Oct 2016 18:22
This achievement is the devil. I've unlocked everything, done everything as everyone. All I need to do is find and pick up the Sworn Protector. An angel room item. I've done so many Greed runs as Isaac, re-rolling the key pieces and the very rare actual item in an Angel room and nothing. I've even had the Mega Blast without much trying. The same thing happened to me with the base game 100% achievement, needed one last item that was pretty generic. Wish me luck.
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By Lyco499 on 25 May 2017 18:53
I'll become not the Mega Blast about 40+ hours. Hundred of rerolls and Devil Rooms nothing angry
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By Deadzone Fight on 31 Dec 2017 14:21
If you've started afternoon plus would you need to 100 percent that before earning this I'm pretty sure if done everything for after birth but this secret won't unlock still
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By G3T jiMMi3D on 01 Feb 2020 13:17
Finally got Mega Blast, the last thing I needed, in a greed run like you suggested and this still didn't pop for me. (I purposefully didn't get any expansions until I completed this)
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By Cheese Empanada on 19 Mar 2020 19:01
This just unlocked for me right before fighting hush on one of my first repentance runs ( first with Bethany). Is it just numerical maybe, because it happened right after I picked up an item from the expansion
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By Anatana on 19 Dec 2021 17:07
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Unlock all of the secrets and endings, and collect every item in the game
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27 Aug 2018 00:00