UNDER NIGHT IN-BIRTH Exe:Late (452510)

Compatibility Report

• Name of the game with compatibility issues: UNDER NIGHT IN-BIRTH Exe:Late
• Steam AppID of the game: 452510

System Information

• OS: Ubuntu 18.04.1 LTS
• KERNEL: 4.15.0-39-generic
• CPU: Intel Core i7-8700K @ 3.70GHz
• GPU: NVIDIA GeForce GTX 980
• GPU DRIVER: NVIDIA 415.13
• RAM: 32 GB
• Proton Version: 3.16-4 Beta
• Specs gist: available here

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.
• that I believe the game is ready for full review.

Proton Log

• Available on Gist.
• Available on Google Drive

Symptoms

• Game started as-is has issues
  • AI (apparently not initialized)
  • CPU characters (either full health or 0 health, struck down with only one hit).
  • Quirk: Input spam between fights may crash the game.
• Game started with PROTON_NO_ESYNC=1 actually works
  • Quirk: Input spam between fights may crash the game.
• Graphics work fine until entering Customise Mode once. Then resource loading goes to (appropriately with the theme of the game) hell. Will provide a youtube link showing what I mean at some point.

Reported Fixes

• PROTON_NO_ESYNC=1

Reproduction

1. Download
2. Play as-is
3. Edit Launch Options to PROTON_NO_ESYNC=1 %command%
4. Play some more

Start by reproducing the game with Proton 3.16-4 Beta using the listed launch options, then inspect the Proton log and system information gist. Compare AI, CPU characters, input-spam crashes, and Customise Mode resource loading with and without PROTON_NO_ESYNC=1; done would require identifying and documenting a reproducible compatibility cause or fix.