Does GameMaker Studio 2 require an internet connection?
When you first install GameMaker Studio 2 you will be required to have an internet connection to log into the product and download any additional runtimes. After that you can use the product offline, although you will be required to connect again every few weeks to verify the account using the product. Note, though, that by not being connected you will not be able to access various features like Account Management or the Marketplace, nor will you receive any updates to the IDE or the runtimes.