Slay the Spire 2 Stuck on the Steam Launch Screen — Three-Step Fix

The infinite launch screen — Steam says "Running," the game shows a logo, and nothing else ever happens — has three known killers, in order of success rate. Work top to bottom.

Step 1: disable Steam shader pre-caching (highest success)

1. Steam → Settings → Downloads.
2. Uncheck Enable Shader Pre-Caching.
3. Restart Steam, then launch the game.

Pre-caching compiles shaders at startup; when its cache conflicts with a driver update, the launch sequence stalls exactly where you're stuck.

Step 2: switch the rendering driver

Steam → right-click the game → Properties → General → Launch Options, and add one of (test one at a time, keep the winner):

• --rendering-driver opengl3 (try this first)
• --rendering-driver vulkan

Vulkan/OpenGL conflicts after GPU driver updates are the second-most-common cause of a frozen launch. If the game opens windowed-small or flickering, append -windowed.

Step 3: verify game files

Right-click the game → Properties → Installed Files → Verify integrity of game files. Let the scan finish completely before launching again.

Also worth doing

• Close the Steam in-game overlay: Properties → General → uncheck the overlay.
• Exit background interferers: Discord overlay, GeForce Experience, recorders, antivirus scans — anything that injects into processes.
• Run as administrator: right-click the game exe → Compatibility → administrator.
• Delete the Sentry file: in the install folder, remove libsentry.windows.release.x86_64, then restart Steam.
• Update your GPU drivers if none of the above moved the needle.

After it launches

If the game now starts but stutters or crashes mid-fight, head to the stutter and performance guide — the causes and fixes are different once the engine is actually running.

Keep reading:

• Won't Launch — Crashes and Black Screens
• Stutter and Performance Fixes
• System Requirements