There seems to be a Steam server outage going on atm, some reporting they cannot login.
Valve said it's affecting their games too. It's being worked on.
@schmaker @gamingonlinux I'm not defending DRM, but it is possible to be offline and play Steam games https://help.steampowered.com/en/faqs/view/0E18-319B-E34B-B2C8
@schmaker @rotopenguin @gamingonlinux yes, but you don't have to pass the login server *right now* (during an outage) if you follow those directions. (people don't seem to be understanding that.)