Compatibility Report

• Name of the game with compatibility issues: Zelda Again: Link Is Adventuresome (https://hoverbat.itch.io/ziiaol)
• Steam AppID of the game: N/A

System Information

• GPU: Intel Arc B580
• Video driver version: Mesa 25.2.1-arch1.5
• Kernel version: 6.16.4-arch1-1
• Link to full system information report as Gist: https://gist.github.com/SapphireDrew/93273def683169fb8e55acce4e7994b7
• Link to Steam Runtime Diagnostic Report: https://gist.github.com/SapphireDrew/52da4d059303e9918eedba239eaa4f20
• Proton version: Experimental

I confirm:

• [x] that I haven't found an existing compatibility report for this game.
• [x] that I have checked whether there are updates for my system available.

Proton Log:

steam-10049938544543137792.log

Symptoms

Game crashes on launch and produces the following error dialog box:

___________________________________________
############################################################################################
FATAL ERROR in Fragment Shader compilation
ShaderName: shd_pal_swapper

memory:141:3: E5017: Aborting due to not yet implemented feature: Instruction type HLSL_IR_LOOP.

at gml_Script_p_init
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Script_p_init (line -1)
gml_Script_p_Create
gml_Object_p_Create_0
called from - gml_Script_obj_start_Create (line -1) - <unknown source line>
gml_Object_obj_start_Create_0

Reproduction

• Download and extract the game from its itch.io page: https://hoverbat.itch.io/ziiaol
• Use the "Add a Non-Steam game" feature to add the above mentioned game
• Use any version of Proton (tested with Proton 9.0-4, Experimental, and Hotfix)
• Observe crash