What would happen if two people ran GalCiv2 from the same purchase on different computers?

It's kind of a grey area. We do explicitly allow dual simultaneous usage of Sins for LAN multiplayer games, however there's no such reason for GC2. We do allow the owner to install on multiple machines they own, though, and we can't really do anything to stop you from playing two at once aside from appealing to your honesty.

To add to waht kryo said, if you want game companies to continue to make games it's best to give them money to make said game. 

technically nothing prevents you from it

but since you're two persons living at two different places...

And the game is not that expensive at all.... 

I would go for the "buy two copies" scenario but in all honesty unless your parents are both well off i cant see them agreeing to buying a second copy. Most parents would just say "your brother has a copy, use his", so as you are not going out of your way to pirate copies of the game and are using your copy 'in the family' i would not worry about both of you using it at the same time.

If it helps you to sleep at night (LOL) both myself and my wife use my copy, sometimes even at the same time on our two laptops

Oh and by the way it would not mess-up your games. In fact you could register two character names under your Metaverse profile and try and better each other in the charts Nothing like a little sibling rivalry to help better yourself

Yeah.  If you were an adult I'd tell you to buy a second copy, but I know how wierd it can be with a family issue like that.

Just buy another Stardock game or six down the road and be sure to tell Frogboy and Kryo how awesome they are.

If possible, buy a second copy.

I'm not exactly liking how people are making assumptions about the personalities of your parents. I try not to judge people I've never met.

If you have an allowance, perhaps it's time to start saving?

Honesty? I'm sorry, that's ridiculous. If someone wants to listen to the same album as me, I don't have to buy two copies of the album. When I buy a movie, controlled by the MPAA, hardly a bastion of rational and sane thinking, they don't expect me to buy two copies of the movie.

I'm sorry, but this has nothing to do with HONESTY. Why should software be held to a different standard than any other entertainment medium? I find this a bit rich coming from a company who has done this Gamers Bill of Rights nonsense. (Which is little more than a PR stunt IMO.)

Stardock, I love ya, but really, DRM aside, your attitude is as asinine as the companies you rail against.

UncleDrood, you are comparing apples with oranges.

If you purchase a music CD, two can not listen to it at the same time in different locations.

If you purchase a movie (DVD or VCR or whatever), two of you can not watch it at the same time in different locations.

Unless, that is, you make illegal copies of it to distribute.

It has everything to do with HOSESTY!