Fun, addictive turn based strategy game which all fans of Civilization should pick up. This is..

User Rating: 8.8 | Sid Meier's Alpha Centauri PC
..very similar to Civ only with new units, technologies etc.. If you loved Civ, you'll love this. If you never played Civ, then this is a good place to start. Fun, addictive and you can create your own units which offers you a lot in terms of replay value. A Turn based strategy game done very well, although now that CivIII is out, your better off checking that out. As much as i did prefer Alpha Centauri, i played and enjoyed CivII: Test of Time a lot more. Worth getting to add to your collection. It is a classic game which a lot of people rave about.