Troubleshooting and Launch Fixes — The Mound: Omen of Cthulhu

Common Launch-Day PC Issues

The Mound: Omen of Cthulhu launched July 15, 2026 on PC, PlayStation 5, and Xbox Series X|S. Early Steam players report intermittent crashes on splash screen, freezes during loading, and Unreal Engine fatal errors—especially on laptops with hybrid graphics or outdated GPU drivers. ACE Team has not published official day-one patch notes yet; community workarounds below help most PC sessions start reliably while hotfixes roll out.

Console players should install the latest system update, enable performance mode, and restart the console before first launch. Cross-play join failures often trace to version mismatches—ensure all squad members update to the same build before accepting Tempestad contracts.

If problems persist after these steps, report through Nacon Discord and Steam discussions with your GPU model, driver version, and crash log. See Post-Launch Updates for official changelogs when ACE Team posts them.

Patch 1.01 Known Issues (July 21, 2026)

Patch 1.01 shipped July 21, 2026 on all platforms—see Patch 1.01 changelog for optimisation, server passwords, and balance. ACE Team confirms two issues for the next hotfix: Saints disappearing after one expedition unless you restart the lobby; in-game microphones not always detected correctly. Restart lobbies between long sessions and verify platform mic permissions outside the game if voice fails.

If you stayed on the Steam Open Beta branch, revert to default and restart Steam so your build matches console friends. Cross-play requires identical patch versions across the squad.

Console Performance and Network Drops

Patch 1.01 includes console optimisation improvements for Series S frame dips in dense jungle and fort interiors. Enable performance mode, use wired Ethernet for the host, and update to the latest build before judging stability. Residual disconnects may still occur on peer-to-peer hosts—extract with secured loot if partners drop mid-contract. See Co-op Survival.

Report console crashes with platform, performance mode setting, and contract zone to Nacon Discord. PC hybrid-GPU fixes below still apply to Steam players.

Steam Open Beta Branch (Archive)

Patch 1.01 shipped July 21, 2026 on all platforms. If you still opt into the July 17 Open Beta via Steam Properties → Game Versions & Betas → [OPEN BETA], revert to default so your build matches console friends. Cross-play is disabled on the beta branch.

Full changelog: Patch 1.01.

Force Dedicated GPU on Windows

Hybrid laptops often default to integrated graphics for new executables, causing instant crashes or fatal errors. Close Steam completely, open Windows Graphics Settings, browse to the game executable under your Steam library folder, and assign High Performance to your dedicated NVIDIA or AMD GPU. Save, restart Steam, and launch again.

NVIDIA Control Panel users can also set The Mound to prefer maximum performance under Manage 3D Settings. Verify Windows displays the correct GPU before relaunching—integrated graphics rarely meet minimum specs for sanity post-processing and jungle foliage.

Steam Launch Options and DirectX

Right-click The Mound in your Steam library, open Properties, and test Launch Options one at a time—do not combine flags in a single attempt. Community reports suggest -dx11 resolves Unreal fatal errors when DirectX 12 fails on specific driver combinations. If crashes continue, try -dx12 or -windowed separately.

Disable Steam Overlay, Discord overlay, GeForce Experience overlay, and Xbox Game Bar before testing—overlay injection conflicts with Unreal titles at launch. Re-enable one at a time after stable boot if you need them.

Run Verify Integrity of Game Files from Steam Installed Files tab to replace corrupted downloads after interrupted installs. Pair with updated GPU drivers from NVIDIA or AMD before retrying.

Performance and Settings After Stable Boot

Once the game launches, tune graphics via Best Settings and enable DLSS 4.5 on GeForce RTX hardware for stable frames during fort fights. Disable motion blur for clearer threat reads during sanity effects.

Peer-to-peer co-op hosting stresses the session host—close background apps and use wired Ethernet when four-player cross-play squads depend on your connection. Read Cross-Play for mixed-platform lobby tips and Beginner Tips once you reach the Tempestad without crashes.