Does every player need to own the game?

[Sir_Armand]

I have a question: If I buy the game, can I invite my friends to play a campaign, or do they all have to buy the gama?

[Maple Leaf]

You all need to have an installed copy of the game on your own computer to be able to play other players.
It's a great game.
If you buy the game and are looking to get in a pbem game let me know. I have several on the go and often have an opening.