Steam Achievements in The Mound: Omen of Cthulhu
Complete Steam achievement guide for The Mound: Omen of Cthulhu — 25 launch achievements, expedition milestones, sanity challenges, and co-op goals.
25 Launch Achievements on Steam
The Mound: Omen of Cthulhu ships with 25 Steam achievements at the July 15, 2026 launch. PlayStation and Xbox platforms use platform trophy systems with equivalent goals though naming may differ. Achievements reward expedition milestones, co-op discipline, lore collection, and mastery of sanity—not speed-running every combat encounter.
This wiki groups achievements by theme so squads can plan focused runs instead of chasing counters randomly. Exact achievement names and hidden requirements may differ slightly from Steam API strings—verify in-game after major patches. Failed expeditions often do not preserve partial progress toward multi-step achievements; plan dedicated cleanup runs after unlocking fort logbooks.
Pair achievement hunting with Meta Progression and Forts & Logbooks so unlock routes stay efficient with minimal backtracking.
Expedition and Extraction Milestones
Core progression achievements cover first successful extraction, completing contracts across coastal, fort, and Mound-adjacent tiers, and recovering multiple fort logbooks. Some require extracting with full squad survival; others reward partial loot success after sanity-heavy runs.
Launch changes affect achievement routes: the removed mission-end timer lets crews linger for optional shrine loot, but sanity collapse still ends runs—do not confuse unlimited time with unlimited safety. Use post-timer freedom for achievement cleanup only when madness budgets allow.
Temple of Yig and Deluxe mission achievements require the host to own relevant DLC—see Temple of Yig DLC Guide before scheduling co-op trophy nights.
Combat, Sanity, and Co-op Discipline
Combat achievements include noise-discipline challenges—extract without musket fire, clear objectives with crossbow-only kills, or survive Advanced contracts. Sanity achievements reward stabilizing teammates, surviving high-tier madness without friendly fire, or discovering codex and guidebook pages documented on Guidebook & Lore.
Co-op trophies assume human squads for voice verification; solo players with bot companions can still unlock many milestones but may struggle on strict no-damage or synchronized extraction goals. Cross-play achievement parity holds across PC, PS5, and Xbox when logged into the same platform family account.
Weapon Upgrade Anvil achievements tie to spending contract tokens—bank tokens during teaching runs, then spend in a dedicated upgrade session per Weapon Upgrades.
Efficient Cleanup Strategy
Build long-term counters through normal progression first—logbook unlocks, character rescues, and anvil upgrades—then create focused lobbies for unusual conditions like stealth-only or solo bot runs. No verified source proves any achievement is permanently missable, but failed extractions may not save partial credit.
Use coastal contracts to learn achievement triggers before risking fort wipes. After the launch mystery sanity effect and doppelganger improvements, re-read Sanity Hallucinations before attempting madness-related trophies.
Track platform-specific lists on Steam, PlayStation, and Xbox profile pages. This wiki updates when dataminers or ACE Team posts confirm hidden achievement names after hotfixes.
Frequently Asked Questions
How many Steam achievements exist at launch?
Twenty-five achievements on Steam as of the July 15, 2026 retail unlock.
Are achievements missable?
No confirmed permanently missable trophies, but failed runs may not preserve partial progress—replay contracts after unlocking deeper fort spawns.
Do demo achievements transfer?
Demo achievement support was limited. Retail launches a fresh Steam achievement list—assume no demo carryover.
Can I earn trophies solo with bots?
Many expedition milestones work solo. Strict co-op or voice-dependent goals still favor human squads.
Do achievements require Deluxe Edition?
Base game covers most achievements. Yig mission and Fortune Hunters content may have DLC-specific goals—host must own installed content.
Video Walkthrough
Watch the official gameplay footage below to see the techniques described in this guide applied in a real expedition.