Neotokyo (244630)

Compatibility Report

• Name of the game with compatibility issues: Neotokyo (source mod, directx9)
• Steam AppID of the game: 244630

System Information

• GPU: GeForce GTX 670MX
• Driver/LLVM version: nvidia 418.43
• Kernel version: 4.19.29-1-lts (Arch Linux)
• Link to full system information report: gist
• Proton version: 3.16.8 Beta

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.

with PROTON_LOG=1 %command%: log

Also tried with PROTON_USE_WINED3D=1 (same log above)

Symptoms

Game crashes as soon as it reaches the main menu.

Reproduction

Start the game with no modification.

Tried gdb_run from the /tmp directory and noticed this after typing "continue" (may or may not be related):

00000026:00000027: output debug string ("AppFramework : Unable to load module Z:\\ssd_data\\SteamLibrary\\steamapps\\common\\NEOTOKYO\\bin\\filesystem_steam.dll!\n")
00000026:00000027: output debug string ("Unable to load Z:\\ssd_data\\SteamLibrary\\steamapps\\common\\NEOTOKYO\\bin\\filesystem_steam.dll")
0026:0027: loads DLL  @0x7d5d0000 (0<0>)

Program received signal SIGFPE, Arithmetic exception.
0x7ef19f32 in floorf64 () from /usr/lib32/libm.so.6

Start by reproducing Neotokyo's main-menu crash with Proton 3.16.8 Beta and review the linked Proton log and gdb output. Investigate the SIGFPE reported in floorf64() and the failed filesystem_steam.dll load; done means identifying the cause and verifying that the game no longer crashes.