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Pitch Black is challenge #1. This challenge inflicts Curse of Darkness and Curse of the Unknown on you on every level. Unlike other challenges, treasure rooms are available, but shops are not. Your goal is to defeat Mom. This challenge is unlocked by default.
Difficulty[edit | edit source]
The curses you are inflicted with are typically not that challenging on their own, in this challenge however, they are persistently in effect. The primary difficulty of this challenge comes from having to deal with Curse of the Unknown for the entirety of the run, which will make it much more difficult to keep track of Isaac's health a couple of floors in. This also makes it especially risky when utilizing mechanics that drains Isaac's health, such as deals with the Devil or blood donation machines.
Additionally, Curse of Darkness, although mostly just themetic, will also make it harder to spot tinted rocks, which normally would aid Isaac's survival with soul hearts. On top of all this the shop is not available in this challenge, which would have been a semi-reliable way to heal Isaac.
Strategy[edit | edit source]
While Devil deals can provide power boosts, it may be best to abstain from them unless you carefully keep track of your remaining health. In fact, refraining from deals can give you access to angel rooms, which can provide items without sacrificing health.
Turning the gamma setting up in the options makes Curse of Darkness less of an issue.
While marginally useful, finding a door to a Challenge Room can at least gauge Isaac's health by checking whether it's open or closed.
Keep track of rooms where spare heart pickups are so can they can easily be found for a quick heal, or to check if Isaac is at full health.
Unlockable achievements[edit | edit source]
|1.||Pitch Black||2.||High Brow||3.||Head Trauma||4.||Darkness Falls||5.||The Tank||6.||Solar System||7.||Suicide King||8.||Cat Got Your Tongue|
|9.||Demo Man||10.||Cursed!||11.||Glass Cannon||12.||When Life Gives You Lemons||13.||Beans!||14.||It's in the Cards||15.||Slow Roll||16.||Computer Savvy|
|17.||Waka Waka||18.||The Host||19.||The Family Man||20.||Purist|
|21.||XXXXXXXXL||22.||SPEED!||23.||Blue Bomber||24.||PAY TO PLAY||25.||Have a Heart||26.||I RULE!||27.||BRAINS!||28.||PRIDE DAY!|
|29.||Onan's Streak||30.||The Guardian|
|31.||Backasswards||32.||Aprils Fool||33.||Pokey Mans||34.||Ultra Hard||35.||Pong|
|The Binding of Isaac: Rebirth|
|Achievements||Attributes||Bosses||Cards and Runes||Challenges||Chapters|