snooli: As per that thread, a solution is to install nwjs-bin from AUR and then run nw with crosscode/game as first argument.
edit:
If you can't get it to work, I'll try to explain it better.
darcrossito: No worries. Thanks for the notice, I haven't checked the steam thread for a while.
I had the same problem, but it start on my Debian machineit give me some font problems.. but the game start after a while.. but while i close the program i found this on the shell:
varios errors there>
Fontconfig error: "/etc/fonts/conf.d/90-synthetic.conf", line 6: invalid attribute 'version'
Fontconfig error: Cannot load config file from /etc/fonts/fonts.conf
[S_API] SteamAPI_Init(): SteamAPI_IsSteamRunning() did not locate a running instance of Steam.
[S_API FAIL] SteamAPI_Init() failed
[3126:3136:1218/120153.972267:ERROR:broker_posix.cc(103)] Error sending sync broker message: Broken pipe (32)
leon@host:~/Downloads/GOG/CrossCode$
the game start but it give me that error while i close it