The Experiment
"This twisted thing was the result of someone's reckless experiments. Nobody can tell what it was supposed to be originally."
The Experiment only spawns in Frog World.
The Experiment (quite irritatingly) has a steep 150 HP, and drops 1 gold, and 1 heart upon death. The Experiment moves at a moderate speed, randomly repositioning while firing projectiles in every cardinal direction that inflict 30 damage each.
Sources and community notes
- The achievements guide lists a Bestiary Keeper achievement, so every enemy page here matters for completing the Bestiary.
- The achievements guide says Frog World is a secret floor reached by a portal from secret rooms.
Community-sourced (added October 2026, not yet verified in-game). Sources: Steam guide: Achievements guide (updated Jan 11, 2025).