Binding of Isaac: Afterbirth+ adds more items & enemies

Ace roguelikelike allegory ’em up The Binding of Isaac: Rebirth [official site] last night launched the fourth ‘Booster Pack’ for its Afterbirth+ expansion, adding new items, new enemies, new room layouts, and more. As with the other Boosters, this is bringing player-made mods into the base game. I do recognise one tasty addition brought over from ace mod Antibirth: the Schoolbag, which lets players hold an extra active item. Only one more Booster is left to come so I’m glad this update seems a good’un.

Booster Pack 4 has brought five new items, one new trinket, six new(ish) enemies, hundreds of new unique rooms, and new sprites for several old Booster Pack items, as the unofficial patch notes detail. Some of those items do seem neat.

The Schoolbag I already know is great and I have enjoyed Death’s List, which gives stat bonuses or items if you kill a room’s enemies in a specific order. It adds a nice little bit of risk/reward and a new element to how every fight plays out, making me dance around to hit specific enemies.

I’ve not met all the new enemies yet either but the combination of those with the new layouts are welcome fresh air. Vihn and Nikola from the Antibirth team were actually behind the new enemies and rooms, Isaac co-creator Edmund McMillen explained on Twitter. Antibirth is a staggeringly impressive mod so I’m glad to see Edmund and Nicalis finally brought them in. Antibirth is due a big update of its own soonish too.

The bug fixes, tweaks, and new sprites are all welcome. Afterbirth+ has felt a little scrappy and unpolished, and some Booster Pack items especially so. I’ve still played Isaac almost every day, so none of this was game-ruining to me, but I am glad to see it tidied up. Isaac is like tea to me: in idle moments, I’m always thinking a cuppa and a quick bit of Isaac would be lovely.

McMillen says that one final Booster Pack is still to come and he hopes to include some new bits of his own.

I am marginally miffed about the timing of this. Over the weekend I finally grinded through the tedious Ultra Hard challenge, after which I only needed to collect two items to complete everything and get the 1000000% achievement. Now there’s more. Ah well, I guess I’d better put the kettle on and fire up Isaac. I’m now told Booster items don’t count. Heck yeah, let’s go.


  1. AutonomyLost says:

    I saw this article a couple hours ago and noticed no-one had commented yet.

    It’s OK, little Isaac article, I’m here.

    • Premium User Badge

      Drib says:

      I often feel a bit sad when articles are put out there on the internet seas and left all alone with no comments.

  2. His Dudeness says:

    Alice, booster pack items do not need for 1000000%, only original content of ab+.

    • Dezmiatu says:

      It’s still more items to cycle through in the hopes of completing your set. Those last couple items are always tedious.

    • Alice O'Connor says:

      Ooh! That’s great news, thanks. Then the only item I need is Delirious, which I’ve only ever found on daily challenges. (The other, which I guess I don’t need now, turned out to be Broken Modem – an item that’s not rare but I have apparently avoided because it sucks.)

      • PixelBeadGuy says:

        I registered pretty much just to reply to this! Broken Modem came out in Booster Pack #1, so it shouldn’t count either :)

        [PLEASE feel free to edit this part out if it’s uncalled for:

        For those interested in seeing 100s of Isaac Perler Beadsprites, please check out my ongoing project on Twitter or Instagram @pixelbeadguy. I’ve already posted Beadsprites for Booster Pack #4! [endPitch]

  3. someoneelse84 says:

    Alice, how many hours have you logged in this game?

  4. Premium User Badge

    elnicky says:

    Saw a new enemy today in the daily (with the reroll enemies thing). Exciting stuff!

  5. His Dudeness says:

    You need more angel rooms, so just do not deal with the devil and hope for good 4-item angel rooms. :)

  6. SpiceySlade says:

    I actually just got the 1000000% achievement last week. Feels good.

  7. glambery says:

    The new item backpack that can keep another activated item killed my game 3 times!! Don’t get that damn thing!