Civilization II Wiki
The 1996 sequel — 21 civilizations, 51 units, 28 wonders, firepower and hitpoints, and the High Council.
Civilizations
Twenty-one playable civilizations, each with a male and female leader to choose from.
Units
All 51 units. Stats read Attack / Defense / Move; Civ II adds hitpoints and firepower on top.
Technologies
Civ II expands the tree to 89 advances ending in Future Technology. Highlights below — the advances new to Civ II are marked. Full tree being entered.
Wonders
All 28 Wonders of the World — seven of them new to Civilization II.
Governments
Seven governments — Fundamentalism joins the original six.
City Improvements
Civ II grows the building list substantially. Core improvements below — full list being entered.