My quick opinion here: 1. CIV 1 - loved that one. Played on Amiga. Every playtrought took like 2 weeks (micromanaging settlers, every city queue, etc). I was like 12 when I lost that game, managed to recover disks after 2 years! 2. CIV 2 - lost some magic, but let's face it: it was CIV on steroids: BIGGER, BETTER. 3. CIV 3 - bleh, hated it. 4. CIV 4 - nice... Very nice. I was very afraid of that game, because I hated CIV 3 so much. Played only after it got all expansions. Liked it very much. 5. CIV 5 - finally they used my ideas! When I was a kid I was dreaming of one unit per tile rule, ranged combat, nice siege mechanics (CIV 4 - never liked sieges). Managed to get CIV 5 just after release. Hexes + combat - awesome. Rest - mediocre at best. My friend even said that this game is for morons. After G&K I was happy with the game. After BNW - I am even more happy Still some features are missing, and 4 cities strategy is still looming over that game, but it is great. One more expansion (let's move tradition to information era, it should require Great Lighthouse and Terracotta Army, also adopting it should require having 20 units of aluminium and uranium).