In Falsus demo won't launch — is that the same as a black screen?

Not always. Black screen with music usually means the game is running but fullscreen failed — try Alt+Enter first. No audio, instant crash, or hang on the loading logo needs file verification, drivers, or audio settings instead.

Why does In Falsus crash on startup?

Common causes: corrupted demo files, outdated GPU drivers, Windows audio sample rate set too high (e.g. 384 kHz), Steam overlay conflicts, or running on Linux/Steam Deck without GE-Proton.

How do I fix In Falsus on Steam Deck?

Install GE-Proton via ProtonUp-Qt, force it for the demo, and use keyboard + mouse (touchpad for Field notes). See the full Steam Deck guide for gyro layouts and known codec issues.

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In Falsus Demo Won't Launch? Fixes Beyond the Black Screen

In Falsus demo won't start, crashes on launch, or hangs with no audio? Steps after Alt+Enter: verify Steam files, audio sample rate, GPU drivers, overlays, and Proton on Steam Deck.

By In Falsus Tips EditorialPublished Jul 29, 2026

Steam library showing In Falsus Demo — launch troubleshooting guide

If the In Falsus demo won't launch at all — crash, freeze, or hang with no audio — the fix path is different from the classic "black screen with music" case. Start with Alt+Enter and the black screen guide if you hear audio but see nothing. Otherwise, work through the steps below in order.

Black screen vs won't launch

Symptom	Likely cause	First fix
Music plays, screen black	Fullscreen handoff failed	Alt+Enter
Crash before main menu	Corrupt files / drivers	Verify files + update GPU
Hang on logo, no sound	Audio device / sample rate	Lower sample rate to 96 kHz
Linux / Deck: video missing	Proton codec issue	GE-Proton

Fix 1 — Verify Steam game files

Right-click In Falsus Demo in Steam
Properties → Installed Files → Verify integrity of game files
Relaunch after any re-downloads complete

Partial installs are the most common cause of hard crashes on first launch.

Fix 2 — Lower your audio sample rate

Several ProtonDB reports tie launch failures to Windows output above 96 kHz (e.g. 32-bit / 384 kHz):

Settings → System → Sound → your output device → Properties
Advanced → set format to 24-bit, 96000 Hz (or 48000 Hz)
Restart and launch the demo

This also helps when the game starts but intro video/background images fail to load.

Fix 3 — Update GPU drivers and disable overlays

Update NVIDIA / AMD / Intel drivers, then reboot
Disable Steam overlay for the demo (Properties → General)
Close Discord, MSI Afterburner, and GeForce Experience overlays — injection hooks break rhythm games

Fix 4 — Check minimum specs

64-bit Windows 10+, 8 GB RAM, DirectX 11 GPU. There is no native macOS build. Linux and Steam Deck rely on Proton.

Fix 5 — Steam Deck and Linux (Proton)

The demo runs on Deck with tinkering — not officially supported:

Install ProtonUp-Qt in Desktop Mode and add GE-Proton 10-32 or 11-1
Game Properties → Compatibility → force that Proton build
Use keyboard + mouse; Field notes need a pointer (touchpad or gyro — see Steam Deck guide)

Missing intro images/video often clear up after switching from stock Proton to GE-Proton.

Still stuck?

Post on the Steam discussion board with your GPU, Windows version, and whether you're on Deck/Proton. lowiro has shipped multiple demo patches (currently v0.3.x).

Once you're in: demo walkthrough → beginner tips → controls.