You are rival Captains of Time sent back to the past to save your respective futures. You will travel through the Timeline, visiting many of history's pivotal events to ensure they come to pass. However, that may require sacrificing other events to the past that never was.
As you time travel, you will encounter events that help you collect the resources you need to secure the historical events that match your objective. While there is more than one path to do this, only one of you will succeed.
There is a smaller sibling to this game called "Temporal", which utilizes some of the same ideas - but condensed into 54 cards.
Temporal
*game is available for free at Randomskill Games