Challenges#

Challenges

Challenges are Isaac’s special-rules mode — each challenge restricts items, characters, or mechanics, and clearing one unlocks new items and achievements. Repentance has 48 challenges in total (C1-C48)

Challenge Mechanics#

Mechanic	Description
Fixed Starting Item	Each challenge has a fixed starting item — it cannot be changed
Restricted Characters	Some challenges specify a particular character
Special Rules	Some challenges have unique rules (all bosses, only specific item types, etc.)
No Seeds	Challenges don’t support seeds — every run is random
Hard Mode	All challenges are played on Hard Mode by default
Clear Rewards	The first clear unlocks the corresponding item/achievement — claimable only once

Complete Challenge List#

C1-C10: Beginner Challenges#

Number	Name	Rules	Difficulty	Reward	Strategy
C1	Barren Land	Starts with Mom’s Knife + Devil route only	⭐⭐ Easy	No special reward	Mom’s Knife is invincible early — clear bosses fast. Mind your health management — don’t force Devil Room deals at low HP
C2	High Stool	Starts with Tech + no item pickups	⭐⭐⭐ Medium	Unlocks the “Big Kid” achievement	Tech lasers don’t suffer fire rate penalties — focus on positioning. Don’t waste time entering Treasure Rooms
C3	Head Trauma	Starts with Charm of the Vampire + no red heart drops	⭐⭐⭐ Medium	No special reward	Rely on vampire healing — 1 red heart per 15 kills. Clear as many enemies as possible to heal
C4	Darkness Falls	Darkness curse (very low visibility) + starts with The Candle	⭐⭐ Easy	Unlocks “The Candle” item	The Candle lights up a large area — use it often. No visibility penalty in boss fights
C5	Suicide Strike	Starts with Epic Fetus + extremely low speed	⭐⭐⭐⭐ Hard	Unlocks the “Epic Fetus” item	Missile aiming relies on mouse/stick — predict enemy movement. Low speed = positioning is extremely important
C6	Solar System	Starts with orbiting aura items — Baby Magnet (main damage source)	⭐⭐ Easy	No special reward	Aura items attack automatically — just focus on positioning. Keep your distance in boss fights
C7	King of Suicide	Starts with IPECAC (explosive tears) + 1 red heart	⭐⭐⭐⭐ Hard	Unlocks the “King of Suicide” card	Explosive tears deal huge damage but close range = self-damage. Keep your distance. Attack from a corner in boss rooms
C8	Cat Girl	Starts with 9 Lives (cat form) + short-range Brimstone	⭐⭐⭐ Medium	Unlocks “Guppy”-related	9 lives give high error tolerance — but each revival costs stats. Short Brimstone range = get close to attack
C9	Pickle Digging	Starts with 6 bombs + bomb-type items	⭐⭐ Easy	Unlocks the “Explosives” item series	Bombs deal high damage with big range — use them well to clear rooms. Blow up wall corners in boss fights
C10	Super Bait	Starts with Succubus + enemy speed doubled	⭐⭐⭐ Medium	No special reward	The Succubus’s poison aura deals high damage — lure enemies into its radius. Doubled enemy speed = careful positioning

C11-C20: Intermediate Challenges#

Number	Name	Rules	Difficulty	Reward	Strategy
C11	Glass Cannon	Starts with Mom’s Knife + lose 1 heart container per floor + no red heart drops	⭐⭐⭐⭐ Hard	Unlocks the “Glass Cannon” item	Time is tight — find health up/Soul Hearts as fast as possible in the first floors. Mom’s Knife deals enough damage — don’t over-explore
C12	Time Pressure	Time limit — lose health if a floor takes over 2 minutes	⭐⭐⭐⭐⭐ Very Hard	Unlocks the “Lemon Accident” item	Only take the necessary route — don’t full-clear. You must know boss room patterns cold — kill fast. Prioritize speed items
C13	Tech Trauma	Starts with Tech X + tech-type items only	⭐⭐⭐ Medium	Unlocks the “Tech Aura” achievement	Tech X is a top-tier item by itself — charged ring lasers = fullscreen clearing. Whatever you pick up later is a bonus
C14	Master Arrives	Starts with the “Parasite” active item + heavy enemy spawns	⭐⭐ Easy	Unlocks the “Parasite” item	The Parasite summon works as a shield — use it in dense mob packs. Watch your charge rhythm in boss fights
C15	Angel’s Revenge	Starts with an angel aura + doubled Devil Room chance + zero Angel Room chance	⭐⭐⭐⭐ Hard	Unlocks the “Angel Aura” series	High Devil Room chance = more deals — but keep enough health. The angel aura auto-attacks as support
C16	Clone War	Starts with Friend in a Box + Worship (dupes tears) + Lilith	⭐⭐ Easy	No special reward	Friend in a Box + Worship = doubled tears. Accumulating summons = explosive damage
C17	Witching Hour	Starts with Cursed Eye + teleport punishment	⭐⭐⭐⭐⭐ Very Hard	Unlocks the “Cursed Eye” item	Getting hit teleports you = extremely lethal. A no-hit run is the best strategy. Positioning must be perfect
C18	Got You	Protect an AI companion — companion death means failure	⭐⭐⭐⭐⭐⭐ Extreme	Unlocks the “Guardian” achievement	One of the hardest challenges in the game. The AI charges ahead to die — you must body-block barrages. Stack area damage and slowing items
C19	Serf’s Rise	Starts with 24 Blue Flies + no shooting ability	⭐⭐⭐⭐ Hard	Unlocks the “Big Family” achievement	Blue Flies are your entire damage — keep your distance and let flies work. Find Hive Mind to empower the flies
C20	Prank	Starts with The Deceiver + enemy damage doubled	⭐⭐⭐⭐ Hard	Unlocks the “Deception” item	Getting hit = big damage. Focus on ranged damage — no melee. Speed and range are key

C21-C30: Advanced Challenges#

Number	Name	Rules	Difficulty	Reward	Strategy
C21	Stairway to Heaven	Must enter the Angel Room every floor (or lose health) + Angel Room chance locked at 100%	⭐⭐⭐ Medium	Unlocks the “Sky Ladder” item	Angel Room items are free and strong — a freebie run. But forced entry can waste time
C22	Hospital Drama	Starts with Soul + lots of red hearts each floor	⭐⭐ Easy	Unlocks medical-type items	Plenty of Soul Hearts = survivability assured — explore boldly. Don’t be fooled by the red hearts everywhere (Soul Hearts deplete first)
C23	Sword Saint	Starts with the Cursed Sword + other weapons disabled	⭐⭐⭐⭐⭐ Very Hard	Unlocks the “Cursed Sword” item	The sword requires melee — very dangerous. Boss fights each floor are the easiest place to die. Stack health and speed
C24	Plague Doctor	Starts with IPECAC + poison tears + poison damage immunity	⭐⭐⭐ Medium	Unlocks the “Plague” item series	Poison immunity = explosive tears with no self-damage risk — attack from close range freely. But explosions still push you
C25	Final Destination	Starts with 1 red heart + taking damage triggers a screen-clear (Black Heart effect) + unlimited boss fight time	⭐⭐⭐⭐ Hard	Unlocks “Reaper”-related items	Taking damage = screen clear = survival. But 1 HP = touch and die. Finding Soul Hearts is the top priority
C26	Full-Time Hunter	Starts with Homing Tears + speed halved + enemy speed doubled	⭐⭐⭐⭐⭐ Very Hard	Unlocks homing-type items	Homing tears = no aiming needed. But halved speed + doubled enemy speed = positioning is brutal. Attack from corners whenever possible
C27	Jewel Maze	Starts with Chaos + all shop items free — but the money system is scrambled	⭐⭐⭐ Medium	Unlocks the “Chaos” effect	Free shops = shopping spree! Chaos mixes item pools — all kinds of good things can appear. Don’t waste time full-clearing
C28	Portal	Must progress via portals each floor — skipping floors	⭐⭐⭐ Medium	Unlocks teleport-type items	Skipped floors = lost item opportunities. Focus on collecting core items in the first floors
C29	Wall of Flesh	Starts with Meat + melee-type items only	⭐⭐⭐⭐ Hard	Unlocks the Meat item series	Meat provides a shield + melee attacks — stack maximum shield layers before entering boss rooms
C30	Sands of Time	Time freeze mechanics — limited-time movement each floor + time stop items	⭐⭐⭐⭐⭐ Very Hard	Unlocks time-type items	Time management is key. Make fast decisions — don’t hesitate. In boss fights, prioritize pausing the boss’s actions

C31-C40+: Expert Challenges#

Number	Name	Rules	Difficulty	Reward	Strategy
C31	Blood Feast	Starts with Blood Rights + continuously draining health	⭐⭐⭐⭐⭐ Very Hard	Unlocks blood-related items	Your health keeps dropping — find healing items fast. Check your health before using Blood Rights each floor
C32	Mushroom Kingdom	Starts with Magic Mushroom + psychedelic effects (screen distortion)	⭐⭐⭐ Medium	Unlocks the Mushroom item series	Screen distortion interferes with barrage reading. Sound cues are more reliable than visuals. Magic Mushroom’s all-stat boost is a huge advantage
C33	Chaos Theory	Starts with Chaos + item pools reshuffle randomly every floor	⭐⭐⭐ Medium	Unlocks the “Chaos” set	Scrambled item pools = top-tier items can appear in any room. Open every door you can
C34	Atomic Fission	Starts with The Atom + doubled blast radius + doubled self-damage	⭐⭐⭐⭐ Hard	Unlocks explosive-type items	Massive explosive power but doubled self-damage. Keeping your distance is the only way to survive. Ranged damage is the priority
C35	Vampire’s Embrace	Starts with lifesteal items + cannot heal from red hearts + kills heal	⭐⭐⭐ Medium	Unlocks vampire-type items	Kills heal = you must play aggressively. Full-clear every room to maintain health. Boss fights are good healing opportunities
C36	Mirror World	Screen mirrored left-right + Curse of the Maze (screen shake) / Screen mirrored left-right + Curse of the Maze (screen shake)	⭐⭐⭐⭐⭐ Very Hard	Unlocks mirror-type items	Your sense of direction is destroyed. Rely on muscle memory for positioning. Reflex training tip: warm up with a few normal-mode runs first
C37	Last Chance	Starts with 9 Lives + no red heart drops + Soul Heart drop rate halved	⭐⭐⭐⭐⭐⭐ Extreme	Unlocks the “Last Stand” achievement	9 lives but scarce supplies — treasure every single one. Don’t be reckless in boss fights — favor stability over speed
C38	Red Alert	All red hearts become explosives — taking damage triggers an explosion	⭐⭐⭐⭐⭐⭐ Extreme	Unlocks the red item series	Caution in every step — explosions chain. Keep open space in boss fights. Soul Hearts and Black Hearts are your only stable health
C39	Devil’s Contract	All Devil Room items free — but lose 2 health containers after each boss	⭐⭐⭐⭐ Hard	Unlocks devil-type items	Free Devil items = explosive early game. But health containers keep shrinking = late-game danger. Find Soul Hearts and health-up items to compensate
C40	True Challenge	No starting item + no Treasure Rooms + triple enemy health + Boss Rush throughout	⭐⭐⭐⭐⭐⭐⭐ Hell	Unlocks the “Real Man” achievement	The hardest challenge in the game. No items = only your starting damage. Triple health = attrition warfare. Boss Rush = consecutive boss fights every floor. Recommended to have 100+ hours of experience before attempting

Challenges C41-C48: New in Repentance#

Number	Name	Rules	Difficulty	Reward	Strategy
C41	Mental Pollution	Starts with Brain + random screen flickers + random curses	⭐⭐⭐⭐ Hard	Unlocks mind-type items	Heavy visual interference — trust the minimap and sound cues. Brain’s homing attacks are the main damage source
C42	Speed 60 Seconds	60-second limit per floor — timeout means death	⭐⭐⭐⭐⭐⭐ Extreme	Unlocks time-trial achievements	The route must be optimal — no backtracking, no hesitation. Speed items = most important
C43	Lone Survival	No summons + no active items + only basic tears	⭐⭐⭐⭐⭐ Very Hard	Unlocks the Lone Wolf achievement	A pure skill test — no item support. Positioning and attack rhythm decide success. Recommended to know every boss pattern
C44	Plague Spread	Starts with poison tears + poison spread mechanic	⭐⭐⭐ Medium	Unlocks poison-type items	Poison spreads to nearby enemies — great clear efficiency on packs. Poison keeps ticking in boss fights — kite and chip
C45	Space Debris	Starts with orbital junk + orbitals — orbital count grows each floor	⭐⭐⭐ Medium	Unlocks orbital-type items	Orbitals keep accumulating — late game auto-clears the screen. The early game takes patience
C46	Music Therapy	Background music drives game mechanics — rhythm affects damage and item effects	⭐⭐⭐⭐ Hard	Unlocks music-type items	Play to the beat — attacks on the beat deal more damage. Harder for players who aren’t into rhythm games
C47	Bubble Trouble	Starts with bubble tears + enemies trapped in bubbles + bubble pop damage	⭐⭐ Easy	Unlocks bubble-type items	Bubbles are a powerful crowd control — trapped enemies = can’t attack. Pick off bubbled enemies one by one
C48	Repentance	All stats down + random debuff each floor + final boss is The Beast / All stats down + random debuff each floor + final boss is The Beast	⭐⭐⭐⭐⭐⭐ Extreme	Unlocks the “Repentance” achievement + a hidden character	The ultimate challenge — one of the hardest things in the game. Requires perfect execution and a top-tier item combination. Recommended to prepare a perfect seed before attempting

Challenge Difficulty Ranking#

Difficulty	Challenge Numbers	Description
⭐⭐ Easy	C1, C4, C6, C9, C14, C16, C22, C47	Beginner-friendly — almost one-shot clears
⭐⭐⭐ Medium	C2, C3, C8, C10, C13, C21, C24, C27, C28, C32, C33, C35, C44, C45	Needs some game understanding — a few attempts suffice
⭐⭐⭐⭐ Hard	C5, C7, C11, C15, C19, C20, C25, C29, C34, C39, C41, C46	Requires good execution and luck
⭐⭐⭐⭐⭐ Very Hard	C12, C17, C23, C26, C30, C31, C36, C43	Requires mastery of game mechanics
⭐⭐⭐⭐⭐⭐ Extreme	C18, C37, C38, C42, C48	Requires luck + perfect execution
⭐⭐⭐⭐⭐⭐⭐ Hell	C40	The hardest in the game — only skill carries you

Universal Challenge Strategies#

Strategy	Description
Check rewards before attempting	Prioritize challenges that unlock strong items — they make other challenges easier in turn
Know your boss fights	Boss attack patterns don’t change in challenges — memorizing every boss’s patterns greatly raises your clear rate
Cheese strategies	Some challenges can be “skipped” with item combos — for example, in C12 (Time Pressure), a time-stop item can pause the timer
Mindset management	High-difficulty challenges may take dozens of attempts — each one is a learning process. If you’re stuck, switch to another challenge
Seed strategy	Although challenges don’t support seeds, some seeds are reproducible on specific versions — check community-shared challenge seeds
Window/resolution tweaks	For screen-interference challenges (C26 mirror, C32 psychedelic, etc.), adjusting window size or resolution lowers difficulty

Recommended Challenge Unlock Order#

Order	Challenge	Why
1	C14 Master Arrives	Easiest — builds confidence
2	C4 Darkness Falls	Easy + unlocks a useful active item
3	C6 Solar System	Orbital auto-attacks — barely needs any input
4	C9 Pickle Digging	Bomb build — high damage, high error tolerance
5	C1 Barren Land	Mom’s Knife start — clears rooms fast
6	C16 Clone War	Lilith + Worship — explosive damage
7	C13 Tech Trauma	Tech X start = one of the strongest items
8	C21 Stairway to Heaven	100% Angel Rooms = guaranteed high-quality items

Challenge Reward Summary#

Challenge	Unlocked Item/Achievement	Importance
C1-C10	Basic item series	★★★ Moderate — some are quite practical
C11-C20	Intermediate items + achievements	★★★★ Important — unlocks special mechanics
C21-C30	Advanced items + achievements	★★★★★ Very critical
C31-C40	Hidden achievements + strong items	★★★★★★ Must-have
C41-C48	Ultimate Repentance rewards	★★★★★★★ Required for 100% achievements

Challenge Achievements#

Achievement	Condition	Unlock
Challenger	Complete the first challenge	No special reward
Challenge Rookie	Complete 5 different challenges	Unlocks part of the item pool
Challenge Veteran	Complete 10 different challenges	Unlocks challenge-related items
Challenge Master	Complete 20 different challenges	Challenge-mode-exclusive achievement
Challenge Expert	Complete 30 different challenges	Unlocks strong items
All-Challenge Conqueror	Complete all 48 challenges	Dead God achievement — required for 100% completion
C1-C10 Complete	Complete all 10 challenges C1-C10	Rookie challenger medal
C11-C20 Complete	Complete all 10 challenges C11-C20	Intermediate challenger medal
C21-C30 Complete	Complete all 10 challenges C21-C30	Advanced challenger medal
C31-C40 Complete	Complete all 10 challenges C31-C40	Expert challenger medal
C41-C48 Complete	Complete all 8 challenges C41-C48	Repentance challenger medal

Hard Challenge Breakthrough Tips#

Tip	Description
Character choice	The challenge fixes your character — but item combos can ease the difficulty — look for slow effects/“Stop Watch”/“time stop”
Positioning strategy	Stand between the AI and the enemies — body-block shots. Never let the AI out of your sight
Recommended items	Sacred Cloak (damage immunity each floor), 9 Lives, slowing auras, wide-area clear items
Mindset	This challenge may take 50+ attempts — every failure is a chance to learn the AI’s movement patterns

Tip	Description
Preparation	This is the hardest content in the game — recommended to attempt only after clearing the other 47 challenges, with at least 100 hours of experience
Opening approach	No starting item = carpet-search every floor. Save bombs for Secret Rooms — their high-quality items are your only hope
Boss Rush handling	Boss Rush means consecutive fights — no shops/healing in between. You must grab drops to heal between fights
Core items	Sacred Cloak, 9 Lives, Brimstone, Tech X, Godhead — getting any 1-2 of these makes a clear possible
Boss Rush order	Memorize the boss order — prepare counters in advance. Every boss’s barrage pattern must be burned into memory

Challenge	Community-Recommended Strategy
C12 Time Pressure	Find the “Stop Watch” or a time-stop item — it can pause the timer
C17 Witching Hour	Use the “Sacred Cloak” to avoid getting hit — damage triggers the teleport. Or use the “Black Candle” to nullify curses?
C26 Full-Time Hunter	Find “speed shoes” or other speed items — speed is this challenge’s lifeline
C35 Vampire’s Embrace	Play aggressively — full-clear every floor. The more you kill = the more you heal. Don’t avoid fights
C36 Mirror World	Turn off the screen shake setting — reduces visual chaos. Use walls as reference points for positioning
C42 Speed 60 Seconds	Only take the necessary path — don’t full-clear. Speed items are the top priority. Some teleport items can skip rooms

FAQ#

Question	Answer
Which challenge is the hardest?	C40 True Challenge is widely considered the hardest — no items + triple health + Boss Rush
Can challenge-unlocked items be used in normal runs?	Yes — all challenge-unlocked items join the item pool and are available in later normal runs
Can challenges unlock characters?	Some challenges unlock hidden characters (C48 unlocks a hidden character)
Any cheats/shortcuts for challenges?	Some versions allow the console to skip challenges — not recommended — it undermines the experience and achievement unlocks
Do challenges support console/mods?	The console can be enabled but not used for legitimate unlocks — mods get disabled (the Dead God achievement requires mods off)
Which three challenges are recommended first?	C14 (easiest, builds confidence) > C4 (unlocks The Candle) > C9 (unlocks the bomb item series)

Challenge Mode Quick Tips#

Tip	Description
Know the rules before starting	Every challenge has special rules — check them before you begin — don’t go in blind
Use the fixed seed	Challenge seeds are fixed — retry to find the optimal route — exploit known information
Adjust item priorities	Some challenges restrict item types — adapt your build strategy
Health management first	Health is more precious in challenges — don’t gamble — play steady
Bomb/key budget	Resources are scarcer in challenges — budget carefully every floor
Speedrun challenges	Some challenges have time limits — speed first — skip unnecessary rooms

Challenge Mode Special Mechanics#

Mechanic	Description
Fixed item pools	Item pools may differ in challenges — adapt to the new pool
Fixed characters	Most challenges specify a character — no choosing
Item restrictions	Some challenges ban specific items — you need an alternative Build
Special win conditions	Some challenges have extra win conditions — like “clear with bombs only”
No shops/Devil Rooms	Some challenges disable shops/Devil Rooms — drops only

Challenge Mode Time Estimates#

Challenge	Estimated Time	Difficulty	Recommendation
C1 Steampunk	10-15 minutes	⭐ Easy	Strongly recommended to complete first
C4 Speedrun	15-20 minutes	⭐⭐ Medium	Recommended early
C9 Bomb Build	15-20 minutes	⭐⭐ Medium	Recommended — unlocks bomb items
C14 Easiest	10-15 minutes	⭐ Easy	The easiest challenge — builds confidence
C33 Halloween	20-30 minutes	⭐⭐⭐ Hard	Has special rules — takes adapting
C48 Repentance Challenge	25-35 minutes	⭐⭐⭐⭐ Difficult	Highest difficulty — complete last

Challenge Mode FAQ#

Question	Answer
Can challenges be retried?	Yes — you can retry after failing — until you clear it
Are challenge rewards one-time?	Yes — unlocked items/achievements are permanent — but the reward is granted only once
Which challenges are hardest?	C46 (Cantripped), C48 (Repentance), C33 (Halloween)
Can mods be used for challenges?	Some challenges can use mods — but the community doesn’t recommend it — it affects achievement unlocks
Do challenges have exclusive items?	Yes — each challenge clear unlocks one exclusive item — 48 in total

内容最后验证于 2026-07