Well hello there.
Just got Sacred Gold and I gotta say I like it very much. It seems like an awesome game to play in LAN, but the problem is that most of my friends don't have credit cards, and thus cannot purchase the game. I could, however, give the installer to them on a memory stick. Is it possible / legal to use the same CD-key on multiple games for LAN-play?
Thanks,
Zanulix

You're allowed to install and use the game on any pc you own but it wouldn't be legal to give your game out to your friends to play lan. They would need to purchase copys themselfs. You could however gift them the games and then get them to pay you in cash for the games.

Alternatively, if they don't have a credit card, they can get a PayPal account and use that to buy the game themselves.

I installed this game on two computers I own but LAN gaming just doesn't work so do not bother spending your money on it. GOG support did not provide me with any working solution and I assume there isn't one. If there is, I will be more then grateful to learn about it.

Lan seems to work if you use a program called Tunngle