After intros it quits.

Debug log shows it tries to load DLL file named ".dll"

630.308:0008:003c:trace:module:MODULE_InitDLL (0xd5f0000,THREAD_ATTACH,(nil)) - RETURN 1 630.308:0008:0009:trace:module:load_dll looking for L"" in L"Z:\home\mikk\.steam\steam\steamapps\common\Portal 2 Sixense Perceptual Pack;portal2_sixense\bin\;C:\Program Files (x86)\Steam;C:\windows\system32;C:\windows\system;C:\windows;Z:\home\mikk\.steam\steam\steamapps\common\Portal 2 Sixense Perceptual Pack\bin\;C:\windows\system3"... 630.310:0008:0009:trace:module:get_load_order looking for L".dll" 630.310:0008:0009:trace:module:get_load_order got hardcoded default for L".dll" 630.310:0008:0009:trace:module:load_builtin_dll Trying built-in L".dll" 630.310:0008:0009:warn:module:load_builtin_dll cannot open .so lib for builtin L".dll": /home/mikk/.steam/steam/steamapps/common/Proton 3.16 Beta/dist/lib/wine/.dll.so: cannot open shared object file: No such file or directory 630.310:0008:0009:warn:module:load_dll Failed to load module L""; status=c0000135 630.310:0008:0009:trace:seh:raise_exception code=c0000005 flags=0 addr=0xd9f2b87 ip=0d9f2b87 tid=0009 630.310:0008:0009:trace:seh:raise_exception info[0]=00000000 630.310:0008:0009:trace:seh:raise_exception info[1]=00000000 630.310:0008:0009:trace:seh:raise_exception eax=00000000 ebx=00000000 ecx=0000003c edx=0de5d864 esi=0e052a78 edi=0e052a78 630.310:0008:0009:trace:seh:raise_exception ebp=0033e59c esp=0033e48c cs=0023 ds=002b es=002b fs=0063 gs=006b flags=00210246 630.310:0008:0009:trace:seh:call_stack_handlers calling handler at 0x9a16200 code=c0000005 flags=0 630.310:0008:0009:trace:seh:call_stack_handlers handler at 0x9a16200 returned 1 630.310:0008:0009:trace:seh:call_stack_handlers calling handler at 0x9a16308 code=c0000005 flags=0 630.310:0008:0009:trace:seh:call_stack_handlers handler at 0x9a16308 returned 1 630.310:0008:0009:trace:seh:call_stack_handlers calling handler at 0x9a16320 code=c0000005 flags=0