Valor Mortis: Experiment 83 Boss Guide
Experiment 83 is identified in the linked evidence. These are attributed encounter notes and preparation advice, not a claim that this site played the fight.
Identity and source
Fextralife reports Experiment 83 near the Chapter 7 lighthouse and describes a many-limbed creature in a narrow space. Its location and tactics are Reported, not independently replayed here.
Source: Experiment 83 coverage.
Reported encounter notes
Reported. The source recommends using wider tunnel sections and describes unblockable attacks. No attack count or guaranteed Fire/Claymore stun is established here.
Preparation
Inference. Track the room left behind you before retreating. Test which attacks can be defended against instead of assuming every limb attack is parryable.
Check combat commitment and weapon defenses before choosing your kit.
Achievement and limits
Reported. The older trophy guide associates this encounter with Lament of The Limbs. Steam does not publicly expose all hidden boss conditions.
No exact reward, attack duration, elemental multiplier or phase-health threshold is independently verified here.
Sources and evidence
Checked on October 14, 2026. Confirmed identifies primary-source facts; Reported identifies attributed secondary coverage; Inference identifies editorial advice. This is an unofficial fan resource, not a hands-on review.
