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If Valor Mortis will not start, first identify whether you are using the retail release, a demo, or an older playtest. Then restart Windows, install pending Windows and graphics-driver updates, verify the Steam installation, close nonessential background software, and compare your PC with the game’s listed minimum requirements. Those are general Steam launch checks, not guaranteed fixes for a Valor Mortis-specific defect.

Controller failures need a separate check. Steam advertises full controller support, lists Xbox controllers, and lists DualShock and DualSense controllers with USB-only support. Historical pre-alpha and demo reports describe controls disappearing after returning to the main menu, mismatched controller prompts, tutorial-screen crashes, startup crashes, a D3D12core error, and jump or heal inputs stopping. Those reports document older builds; the available official material does not verify that they still affect a current retail build or that a retail patch fixed them.

Start by identifying the build and the failure point

Before changing settings, record three details:

  • Build: retail game, demo, or the 2025 pre-alpha playtest.
  • Failure point: Steam does nothing, the game closes during startup, it crashes after reaching a menu, or it fails during gameplay.
  • Input symptom: Steam or Windows cannot see the controller, the game sees it but assigns the wrong actions, or only particular buttons stop responding.

This distinction matters because the developer’s documented issue list is an October 6, 2025 pre-alpha announcement, while the crash examples come from a June 2026 demo-feedback thread. They are reliable records of what players and developers described in those builds, but they are not proof of a current retail defect.

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The Steam store snapshot used for the available requirements also contained a status mismatch: it showed an October 13, 2026 planned release date while displaying “This game is not yet available on Steam.” Store availability and requirements can change, so check the live listing and the latest official announcement before applying a workaround intended for an older build.

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Run the standard Steam launch checks

Steam’s own launch guidance treats startup failures as potentially having several causes. Work through these checks in order and test the game after each major change. None is a guaranteed Valor Mortis fix.

  1. Restart Windows completely

    Use Start > Power > Restart, then launch Steam again. A restart clears a stalled game process and reloads driver and system services. If Steam reports that another instance is running, open Task Manager, look for a remaining Valor Mortis process, end it, and restart Steam before trying again.

  2. Install Windows updates

    Open Settings > Windows Update, select Check for updates, install available updates, and reboot when requested. Do not assume that a system that can run another DirectX 12 game has every update needed by this title.

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  3. Update the graphics driver

    Install the current driver supplied by your GPU manufacturer for your exact graphics card and Windows version. Reboot after installation. Record the driver version if you later report a crash; a version number is more useful than saying only that the driver is “up to date.”

  4. Verify the Steam files

    In Steam, open Library, right-click Valor Mortis, choose Properties, open Installed Files, and select Verify integrity of game files. Let the process finish before launching. Steam may reacquire damaged or missing files; it does not repair an unsupported driver, an incompatible controller connection, or a bug in the game executable.

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  5. Close nonessential software

    Exit overlays, recording tools, hardware monitors, RGB utilities, macro programs, and other background applications that are not required to run the game. This is an isolation step, not evidence that any particular program is the cause. If the game starts afterward, re-enable programs one at a time to identify a conflict.

  6. Check the installation drive

    Confirm that the game is installed on an SSD with enough free space for the installation and updates. The official listing marks an SSD as required. A nearly full drive can also prevent Steam from completing file operations even when the nominal game size fits.

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  7. Compare your system with the official listing

    Use the table below, then check the current Steam page again because store requirements are subject to revision.

Valor Mortis PC requirements listed by Steam

Item Minimum listing Qualification
Operating system Windows 10 Current Steam store requirement in the captured listing.
Processor AMD Ryzen 5 3600 or Intel Core i5-10600K The listing presents these as the minimum CPU pairing.
Memory 16 GB RAM Listed minimum system memory.
Graphics AMD Radeon RX 5600 XT or NVIDIA GeForce GTX 1660 Ti The listed minimum GPU pairing.
Graphics API DirectX 12 Your Windows installation and driver must support the required API.
Storage 60 GB available space An SSD is also marked as required.
Advertised performance target 30 FPS at 1080p on Low with upscaling This is the store listing’s stated target, not an independent benchmark or a guarantee for every system.

Meeting a minimum specification means only that the system is within the publisher’s stated baseline. Steam’s general guidance warns that a machine at or close to minimum can still encounter launch or performance problems. Laptop GPUs, power limits, thermal throttling, unusual driver configurations, and background memory use can make two PCs with similar headline specifications behave differently.

If Valor Mortis crashes before or during startup

Separate a launch failure from a gameplay crash

If clicking Play produces no window, note whether Steam changes the button back to Play, briefly shows Stop, or displays an error. If a window appears and then closes, record the last visible screen. A crash at the logo, a crash while opening a tutorial, and a crash after loading a save point are different reports and should not be combined.

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Check the DirectX 12 path without assuming it is the cause

Players in the June 2026 demo-feedback thread reported an error labeled D3D12core. That label indicates where the failure surfaced, not why it happened. It does not establish that DirectX 12, a particular GPU, upscaling, or a single driver version is a universal cause. Apply the Windows, driver, file-verification, and background-software checks first, then preserve the exact error text for a report.

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Understand the historical tutorial-crash reports

Individual demo posts described crashes while opening or paging tutorial screens. One player reported an EXCEPTION_ACCESS_VIOLATION while viewing a tutorial. These are anecdotal reports from a demo build. They do not prove that every tutorial causes a crash, identify a common trigger, or provide a confirmed workaround. If your crash occurs at the same point, include the tutorial name or page, whether the crash happens every time, and whether a fresh launch changes the result.

Do not treat an old workaround as a retail fix

The captured official materials do not verify a current retail patch for the named startup, tutorial, or D3D12core symptoms. Avoid presenting a demo-era setting change as guaranteed. Check the game’s latest announcement, support page, or in-client update notes for instructions that match your installed build.

Fixing controller detection and mapping

1. Determine whether Windows and Steam detect the controller

Connect the controller before starting the game. In Windows, use the operating system’s game-controller test panel or the device’s manufacturer utility to confirm that buttons and axes register. In Steam, open Steam > Settings > Controller and confirm that the device appears. If neither Windows nor Steam detects it, Valor Mortis cannot receive input; troubleshoot the cable, USB port, battery, pairing, or controller hardware first.

2. Match the connection to the advertised compatibility

The Steam listing advertises full controller support and specifically names Xbox controllers. It also lists DualShock and DualSense controllers with USB-only support. A wireless DualShock or DualSense connection is therefore not covered by that listing. Switching to a wired connection can determine whether the problem is transport-related, but buying a controller is not a proven remedy for an in-game mapping bug.

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3. Check Steam Input and the active layout

Open the game’s Steam controller properties and inspect the selected layout. A community layout or an old per-game remap can send a different action than the physical button label suggests. For diagnosis, select the default layout, disconnect other gamepads, and relaunch. If the game responds correctly with one controller but not another, report the model, connection type, and Steam Input state rather than describing the symptom simply as “controller broken.”

4. Test for a lost-input state

When a button stops working, test several unrelated actions. If every control fails, the game may have lost focus or controller connection. If only one or two actions fail, inspect the active preset and bindings. Alt-tab once and return to the game, then reconnect the controller only if doing so does not risk losing progress. Record whether input returns after opening the pause menu or restarting the game.

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Historical Valor Mortis controller issues

Controls stopping after returning to the main menu

The October 2025 developer announcement for the pre-alpha playtest listed a problem in which controls could stop working after returning to the main menu. That statement confirms the issue existed in that playtest; it does not establish that it remains in the retail game. If you see the same sequence, document the exact navigation path and build number.

Controller-preset prompts not matching the selected preset

The same pre-alpha announcement said that changing the gamepad preset could leave tutorials and the pause menu displaying default controls. This is a display mismatch, not proof that the underlying input was remapped incorrectly. Check an actual action in gameplay rather than relying only on the on-screen button icon.

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Keybind editing in the playtest

For that pre-alpha build, the developer said keybinds could not be changed from the main menu. Players had to start the game, open the pause menu, and edit controls in settings. The source does not verify that the current game uses the same menu workflow, so treat this as historical guidance only. If your current build offers a control option directly from the main menu, use that instead.

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Jump and heal actions stopping

June 2026 demo feedback included a report that the default jump and heal buttons could “completely stop working.” The post describes a symptom, not a confirmed cause or a general fix. Check whether rebinding the actions, restarting the demo, or reconnecting the controller changes the behavior, and include those results in a report. Do not infer that every controller or every copy of the game has the same defect.

What the demo crash reports do and do not prove

The June 2026 feedback thread contains separate player accounts of startup crashes, tutorial-related crashes, a D3D12core error, and stopped jump or heal inputs. The reports are useful for matching symptoms, but they cannot establish prevalence, a shared root cause, or a guaranteed workaround. A single player’s hardware, driver, connection method, and game build may differ from yours.

Use the reports as clues for a precise reproduction note:

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  • State whether the failure occurs on every launch or only after a particular menu action.
  • Copy the complete error text, including exception names and module names.
  • Record Windows version, GPU model, driver version, processor, RAM, and whether the game is on an SSD.
  • For controller problems, provide the exact model, wired or wireless connection, Steam Input setting, and the action that fails.
  • Say whether file verification, a restart, driver update, or closing overlays changed the result.

Escalate when the general checks fail

Steam’s general guidance recommends contacting the game’s developer when its checklist does not solve the launch problem. The developer’s demo-feedback post directed players to the Steam forum and Discord for demo reports. Because that invitation was specifically tied to the demo, do not assume it is the current retail support route. Use the latest official support or reporting channel shown for your installed build.

A useful report is concise but complete. Include the game build or branch, the date and time of the failure, exact reproduction steps, the point at which the crash occurs, error text, hardware and driver details, controller model and connection, and whether the standard Steam checks helped. If a crash is intermittent, state how many attempts succeeded or failed rather than calling it constant.

Quick decision checklist

  • No window appears: restart, update Windows and the GPU driver, verify Steam files, close nonessential software, and compare the PC with the listed requirements.
  • The game opens and then crashes: capture the screen or error text, note the exact menu or tutorial, and avoid assuming that a D3D12core label identifies the cause.
  • Windows or Steam cannot see the controller: troubleshoot the cable, USB port, pairing, battery, and device detection before changing game bindings.
  • Xbox controller works but DualShock or DualSense does not wirelessly: test a USB connection because the listing specifies USB-only support for those two controller families.
  • Only certain actions fail: inspect the active preset and bindings, then report the exact action and build if the problem persists.
  • The symptom matches a 2025 playtest or June 2026 demo report: label it as a historical match and check current official notes before applying any old workaround.

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