Do I need to be online to play a shared game?
You must be online to access and play games which are shared with you.
Can two people play on the same Steam account offline?
However, if a game requires you to be online, only one of the people sharing the account can play at a time. In an offline mode, although you can play simultaneously, one of the people sharing the account must be connected to the internet so that the most recent data gets saved onto the game.
Can you play multiplayer games on Steam in offline mode?
Yes, however It depends on the game. The majority of games on steam can be played offline however games that are online only games are obviously unable to be played without an internet connection. Also, you have to be signed into your steam account on the steam program in order to be able to play most games.
Can 2 people play the same game at the same time on Steam?
If 2 people are using the same steam account, no. A single steam player can only play one steam game at a time. If 2 people are using their own account, thus 2 different accounts, then yes. Each owns their own copy of the game.
Why can't I play shared Steam games?
What happens if I get achievements offline?
Do Steam achievements work offline?
What are the rarest achievements on Steam?
How to use 2 Steam accounts on the same computer at the same time?