Official website: http://www.firaxis.com/

 
7.7
Sid Meier’s Civilization Revolution

 
8.4
Sid Meier’s Civilization V: Gods & Kings

 
5.2
XCOM: Enemy Unknown Plus

 
8.6
Sid Meier’s Gettysburg!

 
Civilization V: Scrambled Continents

 
3.0
Sid Meier’s Railroad Tycoon

 
8.6
Sid Meier’s Civilization IV: Gold Edition

 
7.0
XCOM 2: Anarchy’s Children