Hit CTRL-O and look at title in Game Options panel.
If you have a Hex editor check out byte at 10th offset of a save game, starting at zero
(ie 0,1,2, ... 9,10)
27 : Conflicts in Civilization or lower
28 : Fantastic Worlds (2.7.81)
2C : Multiplayer Gold
31 : Test of Time
(I'm on 2.42 a old...