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Failed Experiments are large, humanoid enemies that are only encountered when 4 or more Boss Stem Cells are activated.


The Failed Experiment will use its melee combo if it is close to the player, or simply leap when the target is too far.

It will also dodge behind the player if they try to damage/parry it and then resume its attacks. However, this ability has a cool down of 15 seconds.

Elite Failed Experiments have no attack pattern changes, but their leap is a lot faster, and they are harder to stun, as with any other elite.


Punch and slam

  • Description: Performs three punches, then slams the ground.
  • Can be blocked, parried, and dodge rolled.
  • They can turn around mid-attack, if the player moves behind them before the slam.




  • Description: Performs a leap in the direction of the player. This attack only occurs at long range.
  • Can be blocked, parried, and dodge rolled.
  • Can be avoided by crouching, but only at the peak of the leap.




  • Both of its attacks can be dodged by rolling as well as parrying. This also goes for the head slam at the end of its regular combo which can be parried. However, it can dodge parries if it is the first “attack” directed at it, so it may be better to hit it with something else first so that you can parry it without interruption.
  • With heavy weapons and other typically slow weapons, their dodge can be baited out while the player is still charging the attack, allowing for the weapon to be flipped around and successfully hit the Failed Experiment.


  • The Failed Experiment enemy is a likely product of the Alchemist's experiments, hence the name.
  • These enemies can be considered as a replacement to the Zombie on higher difficulties.
  • Their design, mainly their drill hand, may be inspired by the Bouncer Big Daddies from Bioshock, which have a similar armament.


    • 1.2: Introduced.
  • Enemies

    Zombie.png ZombieShieldbearer.png ShieldbearerUndead Archer.png Undead ArcherGrenadier.png GrenadierOven Knight.png Oven KnightKnife Thrower.png Knife ThrowerRampager.png RampagerFailed Experiment.png Failed ExperimentRunner.png RunnerBat.png BatProtector.png ProtectorScorpion.png ScorpionDisgusting Worm.png Disgusting WormKamikaze.png KamikazeRancid Rat.png Rancid RatYeeter.png YeeterTBSJerkshroom.png JerkshroomTBSThorny.png ThornySlasher.png SlasherMasker.png MaskerHammer.png HammerSewer Fly.png Sewer FlyLacerator.png LaceratorSlammer.png SlammerShocker.png ShockerToxic Miasma.png Toxic MiasmaBuzzcutter.png BuzzcutterInquisitor.png InquisitorSweeper.png SweeperFestering Zombie.png Festering ZombieCorpse Worm.png Corpse WormImpaler (Enemy).png ImpalerSewer's Tentacle.png Sewer's TentacleSpawner.png SpawnerCorpse Juice.png Corpse JuiceBomber.png BomberBanished.png BanishedTBSBlowgunner.png BlowgunnerTBSGiant Tick.png Giant TickTBSWeaver Worm.png Weaver WormCleaver (Enemy).png CleaverPirate Captain.png Pirate CaptainWeirded Warrior.png Weirded WarriorSwarm Zombie.png Swarm ZombieCorpse Fly.png Corpse FlyCatcher.png CatcherCaster.png CasterGolem.png GolemDancer.png DancerDark Tracker.png Dark TrackerCorpulent Zombie.png Corpulent ZombieCannibal.png CannibalBombardier.png BombardierAutomaton.png AutomatonGround Shaker.png Ground ShakerRotGArbiter.png ArbiterRotGDemon.png DemonSkeleton.png SkeletonRotGMyopic Crow.png Myopic CrowFFCold Blooded Guardian.png Cold Blooded GuardianFFStone Warden.png Stone WardenFFApostate.png ApostateFFFailed Homunculus.png Failed HomunculusFFClumsy Swordsman.png Clumsy SwordsmanFFDastardly Archer.png Dastardly ArcherFFCompulsive Gravedigger.png Compulsive GravediggerFFGuardian Knight.png Guardian KnightLancer.png LancerRoyal Guard.png Royal GuardInfected Worker.png Infected WorkerLiving Barrel.png Living BarrelDemolisher.png Demolisher

    link True Ending Spoiler (5 BSC):   Magistrate of Death.png Magistrate of DeathRotGScreaming Skull.png Screaming SkullRotGLibrarian.png LibrarianRotGDefender.png DefenderRotG