Finish Civilization III: Conquests

Climate, floods and a world congress; the expansion that completed Civ VI.

Great Generals, vassal states and six warlike scenarios; the first of the two expansions Civ IV is now sold with.

Corporations, espionage, random events and the Advanced Start - widely held to be the best expansion the series has had.

Religion and espionage return, and combat is rebuilt around the hex map the base game shipped with.

Trade routes, world congress and a culture victory you win with tourism; the expansion that finished Civ V.

Golden and dark ages, loyalty that can flip a city to a neighbour, and governors to hold it.

From a settler to Alpha Centauri, one more turn at a time; Sid Meier's masterpiece of 1996.

Sid Meier's 1991 original: settlers, huts and one more turn from the beginning.