Slay the Spire 2 Black Screen — How to Fix the Black Screen Issue
Updated 2026-06-02
Why Does the Black Screen Happen?
The black screen issue on Slay the Spire 2 usually comes from one of four things: outdated graphics drivers, an incompatible display mode, corrupted config files, or a conflict with overlay software.
Fix #1: Launch in Windowed Mode
Right-click Slay the Spire 2 in Steam. Go to Properties > Launch Options. Paste this: -screen-fullscreen 0 -screen-width 1920 -screen-height 1080. This forces windowed mode and bypasses the fullscreen handshake that fails on some monitors.
Fix #2: Delete Config Files
Go to %USERPROFILE%\AppData\LocalLow\MegaCrit\SlayTheSpire2 on Windows or ~/Library/Application Support/MegaCrit/SlayTheSpire2 on Mac. Delete the preferences.json file. The game rebuilds it on next launch. This fixes corrupted settings.
Fix #4: Update GPU drivers. Both Nvidia and AMD released drivers in 2026 that specifically patch Unity engine black screen bugs. Check for updates.
FAQ
- Does the black screen affect Steam Deck?
- Yes. Steam Deck users see it too. Use the same -screen-fullscreen 0 launch option. Works every time.
- Will Mega Crit patch this?
- They patched it twice in 2025 (patches 1.0.3 and 1.1.1). It still appears for some hardware configs. The windowed mode workaround is the safest fix.