Hydra Slayer achievements

Killed the first Vulture Hydra honorably

Killed a Two-Headed Giant with a machete

Defeat the first boss with an Atlantean.

Clear the first level using no items or weapons except the ash scythe.

Defeat the first boss with a Human.

Defeat the second boss with a Human.

Was killed and came back to life (not as Twin)

Decomposed the Decomposer as a Divisor of size at least 17.

Used the Mushroom Staff.

Had 50+ active mushroom seeds at once

Created a zombie with 200000+ heads

Used the titanic artifact.