Civilization 5 Demo

Hey, so I downloaded the demo of the game Civilization 5 off of steam..... but the demo only lasts to 100 turns... Is there anyway i can "extend" this?

Can anyone tell me if this is remotely possible? Lol.

Try googling.
Probably won't work tho.

buy Civilization 5 real good and fun game

Yeah, i'd try google, but theres ton of viruses and other junk i don't really want to get...

And yeah, i'd get the game but its about $50 right now and I don't feel like spending that when i already have the game downloaded, lol.

Demo is 3.8gb