What is Steam's Offline Mode and how do I use it?
Stored information that is required for offline mode to function may be lost when forcing Steam to close instead of exiting Steam correctly. Always manually close Steam before shutting your computer down or running out of battery life if you wish to use offline mode for an extended period of time.
If the required offline mode data is lost, there is no way to start Steam without an internet connection. If you consistently encounter this issue, ensure that you are not using any programs that can interfere with Steam.
The Steam client application's files must be updated to allow for the use of Offline Mode. If your game's status is "100% - Ready" but you receive the message "This game cannot be started in Offline Mode" when attempting to play offline, the Steam client application's files need to be updated.
Firewall settings preventing Steam from updating itself are the most common cause for this problem. Please see the Troubleshooting Network Connectivity topic for instructions to configure your network so Steam may update if you encounter any difficulties with Offline Mode.
Offline Mode allows you to play games through Steam without reconnecting to the Steam Network every time you wish to play - this is particularly useful if you do not plan on playing over the internet and would prefer not to download new updates for your single-player games.
Please note that you must connect to the Steam Network and test each of the games you would like to use in Offline Mode at least once to set up your account and configure Offline Mode on your machine.
Please follow the instructions below to configure Offline Mode on your PC:
Please follow the instructions below to configure Offline Mode on your Mac: