so heres the deal. my computer was broken when the game came out and i really wanted to play it so i installed it in my dads capable computer. now my computer is fixed and i just tried to install it, but of course steam doesnt allow it because the code is used. i am a little pissed off right now. is there any way to install this multiple times without buying another god damn cd key?

oh sorry i installed on my dad's steam account because he plays civ v also. so that doesnt work.

You have to buy the game again.

i just sent an email to steam asking if they could spare a new one, i dont know if that'll work though. cant i just download a keygen if i have i dont care?

You might be able to play together offline in a lan game or something,  I haven't messed around with the multiplayer.  Just install on your computer under your dad's account and play offline, i.e. playing without logging into steam.  But yea, i mean you want 2 games you have to buy 2 games.

" i just sent an email to steam asking if they could spare a new one, i dont know if that'll work though. cant i just download a keygen if i have i dont care? "

" i just sent an email to steam asking if they could spare a new one, i dont know if that'll work though. cant i just download a keygen if i have i dont care? "

You messed up. It's not Steams fault you brought the game on someone else's account and someone else's computer. 
I've never tried it but I imagine the best you could do is transfer ownership of the game from your Dad's account to yours, and that's assuming Steam is feeling nice. 
Also, piracy :(

" oh sorry i installed on my dad's steam account because he plays civ v also. so that doesnt work. "