Hi there, Thanks for reaching out! It seems that Steam had an outage for many users yesterday around the time of your post. If the issue is still occurring today, please see our guide below for information about Error Code: BUFFALO: [quote]This error appears to players who are not signed in with their platform account, or if their platform service is undergoing maintenance. Additionally, this error may appear to console players if their PlayStation Plus or Xbox Live subscription has expired. Players in a Korean IGR may encounter this general network disconnect error when their allotted purchased internet usage time has run out or their online account plan has expired resulting in a forced disconnect from Destiny services. Players -blam!- encounter this issue should check the status of their platform's services by following the links below. If no outage or maintenance has been reported, and this error continues to occur, please create a new topic in the #Help forums. PlayStation Network Status: https://status.playstation.com/ Xbox Live Status: http://support.xbox.com/xbox-live-status Steam Support: https://help.steampowered.com/ Epic Games Store Status: https://status.epicgames.com/ [/quote] https://help.bungie.net/hc/en-us/articles/360049195971-Error-Code-BUFFALO