The Sanity System

The Mound hides your sanity level. There is no HUD indicator, no percentage, no bar draining in the corner of your screen — the game markets this as its madness system, and the ambiguity is the point. You are never given a number that tells you whether what you are perceiving is real.

• Being alone for too long — the game's own guidance is that your mental resilience is tested when you separate from the party
• Lingering near certain idols in the forest — they amplify the effects of being alone even when your allies are not far away
• Getting caught by a Crawling Canopy — its dark ichor marks you and draws the hostility of other creatures. It aims not to kill but to isolate you
• Being carried off by a Prowler, which seizes a single explorer and deposits them far away and utterly alone

• Stay near Father Escalona or the rowboats you arrived in — both are safe havens from isolation
• Eat a Luz del Sur mushroom; it reduces your feeling of isolation
• Keep your group together; isolation is the fastest path to full madness
• Rank up — the Ring of Isolation Resistance is one of the perks the rank ladder unlocks

The forest attacks your trust as well as your mind, and the two are easy to confuse. The Doppelganger — the Faceless One — is a real creature, not a hallucination: it arranges itself into a perfect imitation of a person, walks among an expedition observing and learning, and strikes only once it has set the party against itself. The game's own lore is blunt about its purpose — it is not meant to overpower a group, but to dissolve the trust within it until the suspicion itself dooms them. So when someone looks wrong, you genuinely cannot tell from looking whether the problem is your sanity or a thing wearing your teammate's face.

Because both failure modes present the same way, the counter is the same for either: trust verbal communication over what you see. Call out your positions, keep talking, and treat a silent 'teammate' who won't answer as the threat they probably are. When in doubt, make for the wagon — a partial haul beats a wipe caused by friendly fire, or by trusting the wrong face.