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Minibosses [Available immediately]
Genetic Monstrosity
Hideously Malformed Mutant
Gravitron Operator
Bosses [Available immediately]
Experiment X-89
Kuralak the Defiler
Miniboss [once both bosses are dead]
Fetid Miscreation
cheese version
Minibosses [once the 2nd floor is reached]
Phagetech Guardians (two of them)
Bosses [each Phagetech Guardian opens a hallway to one of these]
Phage Maw
Phagetech Prototypes
Boss [both previous bosses must be defeated]
Phageborn Convergence
Minibosses [unlocked once the Convergence has been defeated]
Malfunctioning Gear
Malfunctioning Dynamo
Malfunctioning Piston
Malfunctioning Battery
Final Boss
Dreadphage Ohmna
Minibosses [Available immediately]
Genetic Monstrosity
Hideously Malformed Mutant
Gravitron Operator
Bosses [Available immediately]
Experiment X-89
Kuralak the Defiler
Miniboss [once both bosses are dead]
Fetid Miscreation
cheese version
Minibosses [once the 2nd floor is reached]
Phagetech Guardians (two of them)
Bosses [each Phagetech Guardian opens a hallway to one of these]
Phage Maw
Phagetech Prototypes
Boss [both previous bosses must be defeated]
Phageborn Convergence
Minibosses [unlocked once the Convergence has been defeated]
Malfunctioning Gear
Malfunctioning Dynamo
Malfunctioning Piston
Malfunctioning Battery
Final Boss
Dreadphage Ohmna