FreeCiv and FreeCol

[Wolfman]

FreeCiv and FreeCol are like Sid Meier's "Civilization" and "Colonization", but they're better because they're free.

http://freeciv.wikia.com/wiki/Main_Page

http://www.freecol.org/

VIVA LA OPEN SOURCE REVOLUTION!

[gufu1992]

or just download any of there games on abandonia...

[The Brown Cow]

For the record, if you ever feel like playing Civ 2 multiplayer, use FreeCiv instead - it's way quicker and more fun.

...
No, wait. If you ever feel like playing Civ 2 multiplayer, just shoot yourself. It's not worth it.

[waggles v2]

I agree. If you want a game that's similar, find an older version of the game in question for a FAR cheaper price. Here in Australia, I saw an outdated copy of Gran Turismo 3 for 15 bucks.