For many years I've played Galactic Civilizations as the ultimate sandbox. A universe in which each game creates its own lore.

Below are 3 game play examples spread over the past 15 years.

Galactic Civilizations I: Triumph of Evil: https://www.galciv1.com/examples/4/

Galactic Civilizations II: Rise of the Terran Alliance: https://forums.galciv2.com/114483 

Galactic Civilizations III: Rise of the Terran Alliance redux: https://forums.galciv3.com/462912 

Have fun!