The Mound: Omen of Cthulhu Noise Guide

Why noise matters more than raw DPS

The Mound: Omen of Cthulhu is a co-op extraction horror FPS from ACE Team and Nacon. Launch from Tempestad, pick contracts, explore the jungle for loot and logbooks, manage sanity and noise, and extract via the ox-wagon before eldritch threats overwhelm your team.

Extraction horror rewards when you fight, not just whether you win. Loud pushes that wake the whole biome waste ammo, spike sanity stress, and delay extraction — loot only converts on Tempestad if you extract alive with value in the ox-wagon.

Disambiguation

This page covers ACE Team's video game, not the Lovecraft short story "The Mound." Search intent for the mound omen of cthulhu noise should land on jungle stealth tactics, not prose summaries.

Noise vs sanity overlap

Panic from personal hallucinations often causes sprint spikes and wild shots — the loudest noise on many wipes is a player reacting to a phantom. Pair this guide with sanity guide voice checks before blaming "bad stealth RNG."

No fixed noise UI (launch)

Preview coverage describes feel-based threat escalation — birds flushing, distant calls, heavier patrol density — rather than a numeric decibel readout. Phase 2 may add a calculator tool; Phase 1 guides use action tables and squad discipline instead of invented DPS spreadsheets.

Contract tier scaling

Basic contracts forgive sloppy noise; Legendary routes punish the same matchlock burst with tighter extract windows. Match contract tier to your squad's quiet weapon comfort before chasing logbooks in forts.

Gunshots — the loudest tax

Matchlocks and flintlocks hit hard but broadcast position across the biome. One sloppy shot during a logbook hunt can convert a stealth route into a multi-wave defense near the ox-wagon. Reserve firearms for confirmed threats or extract defense when the squad agrees to spend the budget.

Sprinting and heavy movement

Controls default Shift to sprint — audible at range in preview footage. Chain sprinting toward false loot pings is a classic sanity failure mode. Assign a navigator who calls "walk" before camp approaches.

Environmental spikes

Birds, breaking branches, and cart horns create unplanned spikes. Scout players should slow near nests and call "birds ahead" so defenders do not sprint into the flush. Horn calls during extract need squad consensus — fake horns appear in hallucination reports.

When loud weapons are correct

Boss pressure, rescue timers, and downed teammates justify firearms. The skill is calling "going loud" so everyone stops looting and anchors to the ox-wagon before the jungle answers.

Shared contract pool

Starting gear scales with contract tier — harder missions grant better shared equipment at drop. Quiet primaries still matter because you choose when to fire, not whether the gun exists in the pool.

Upgrades at Tempestad

Weapon anvil upgrades on Tempestad improve reliability but do not remove noise. Pair anvil spends with patron saints blessings if your squad expects rain-heavy routes.

Rain + noise double penalty

Teams that rely on gun DPS often panic sprint when rain starts — sprint noise plus helplessness spikes sanity. Pre-assign who owns the quiet backup before leaving Tempestad.

Torch and lamp in storms

Light tools from the weapons hub help navigation without gunfire. Throwing oil lamps creates space but costs noise — use for extract defense, not routine clearing.

Cross-link to weapons hub

Full firearm behavior, durability notes, and launch-week tier bands live on weapons hub — this noise page focuses on when not to shoot.

Land and regroup quiet

First minutes after drop set the noise budget for the whole expedition. Regroup at the landing zone, assign scout/defender, and walk until the squad knows the first objective pin. Sprinting immediately is the top beginner mistake.

Fort and logbook approaches

Logbooks sit in fort tents on high-value maps. Approach forts from side trails with crossbow scouts — not through the main gate with matchlocks blazing.

Deer and bonus value

Wild deer offer low-risk bonus value when taken quietly with melee or bow. One silent kill beats waking the jungle for a single chest — especially when extraction timing is tight.

Extract early discipline

You do not need to clear the entire map. Once loot value or contract objectives are met, route toward the white line at shore — see extraction guide for boat-side rules.

Scout discipline

Scouts push for pins and logbooks — highest noise risk if they sprint alone. Run short loops back to the cart instead of deep solo chains unless trained on solo guide.

Cart defender and horn calls

Defenders stay within lamp radius of the ox-wagon and arbitrate horn blasts during extract. Fake horns lure carriers away in sanity reports — squad consensus before moving.

Crossplay comms

Platform mix via crossplay adds latency to "going loud" calls. Pre-agree keywords in Discord before launch.

Sanity feedback loop

Hallucination panic produces the worst noise spikes — wild shots at phantoms wake real enemies. Voice-verify before firing; read the full sanity guide phrase kit.

Enemy types and noise response

Bestiary entries include prowlers, deep ones, birds, and Y'm-bhi-style horrors — many respond to noise while others overlap with illusions. The enemies hub separates verified creatures from possible phantoms.

Extraction timing

Noise spikes near extract are expensive — you are closest to success and one gunshot from losing the ox-wagon bank. Gather at the boat white line once living players are ready; you do not need to wait for the cart to physically arrive.

Solo noise habits

Solo players with AI companions still wake the jungle the same way. AI helps in fights but cannot negotiate noise budget — bias toward crossbow primaries and early extract.