What do I get when buying a Catan game?
What do you get when you 'buy' a game of Catan? Do I still get to play against nothing but AI's (my preferred method)? Or for AI games do I have to keep buying scrolls?
I have a work and a home computer, one Windows and the other Apple. If I buy a game, can I access it from both computers, or do I need to buy two games?
When you buy the base game, you can play that as long and as often as you'd like, both in multiplayer games and against computer players. The same applies for expansions. The only difference is that - just like in the board game - you need to have the base game to be able to purchases expansions.
All your purchases (no matter if from Steam or from the browser based-version) are linked to your Catan Universe account. As long as you use the same account, you can play on both platforms. However as accounts are personal, you won't be able to play with the same account on two devices at the same time.