Unlocks the Kremlin World Wonder.
Tier 1 Edit
Academy of Sciences Edit
Each City increases Science costs of Technologies by 3.75% (instead of 5%).
+6 Tourism in each City.
Universal Healthcare Edit
+1 Happiness from each National Wonder and Guild.
Double Agents Edit
+2 Spies and Spies are twice as likely to kill enemy Spies when stationed in your Cities.
+3 Food and +1 Happiness in each City.
Iron Curtain Edit
+5 Production from Internal Trade Routes.
Five Year Plan Edit
+25% Production towards Buildings in all Cities and +1 Production from each Mine, Quarry, and Manufactory.
Tier 2 Edit
[Prereq: 2x Tier 1]
Workers' Faculties Edit
Satellite States Edit
Conquered Cities have no resistance time and gain a free Police Station.
Socialist Realism Edit
+50% Tourism to Civilizations with less Happiness.
Reduces Unhappiness from Ideology pressure by 75%.
Ministry of Railways Edit
+10% increased Production boost from Railroads and +1 Happiness for each City connected to the Capital by Railroads.
Tier 3 Edit
[Prereq: 2x Tier 2]
Spaceflight Pioneers Edit
Red Army Edit
+15% Combat Strength when fighting Units belonging to a Civilization with fewer Cities.
Cultural Revolution Edit
The Empire gains bonus % for Great Musician points equal to its Production output.
Party Leadership Edit
+3 Happiness per City.