Observer – Disable Launcher
Right click Observer in library and choose Properties.
In the GENERAL tab click on SET LUNCH OPTIONS… and have a nice sandwich.
In this blank field put;
“C:Program Files (x86)SteamsteamappscommonObserverTheObserverSub.exe” %command%”
(this path is most likely correct, change it to what ever your path towards TheObserverSub.exe is)
OK > CLOSE > PANTS OFF > PLAY > PARTY PARTY!!!