We recommend 1-6 players for this game, though larger groups are possible. You only need to purchase one copy of Mission: Elfpossible if you are all playing together.
As a group, you can play by sharing one computer screen or by using multiple computer screens. The game auto-saves as you hit milestones, so if one person is ever behind, they can refresh the page to view the latest puzzle.
To play remotely, one player can share their screen through a video conferencing platform such as Zoom. Multiple players can still have the same website up and interact with the game.