Sometimes, yes. You need to be online when you’re:
Installing Moviestorm
Running Moviestorm for the first time
Installing new content packs
Updating Moviestorm
Logging in to Moviestorm
You need to log in to Moviestorm every 14 days. Once you’re logged in, Moviestorm will remember your login details for two weeks, and you don’t need to log in again during that time.