According the some sources, each sunrise and sunset mark the backdrop for the perpetual battle between Horus and Seth. In this never-ending combat, Seth, god of darkness and chaos, prevails over Horus with the arrival of each night. However, in an eternal cycle of revenge, the victory of Horus, god of the sky, heralds the coming of each new day, continuing a cycle which has endured since the beginning of time.
In the game, Horus and Seth face each other in three locations: the world of the living (the Deshret), the underworld (the Duat) and the Sun Boat, or Mandjet, which symbolises the sun’s journey across the sky.
Sunrise Sunset is a competitive game for two opponents where in each round players take turns in playing cards (up to a total of 6 each) in order to gain control of the three locations. In each location the opponent with more power takes control.
The first player to deal three damage is the victor of the game.
Beginning with the starting player, the players take turns to play cards one after another until they have played all of their cards and assign it to one of the three lanes of your choice. The cards with stealth are played facedown, unlike the cards without stealth, which are played faceup.
If the card that you play has a placement ability, this is applied immediately.
Once each player has played all of their cards, determine who is the victor and loser in each lane. Apply all of the combat abilities of the units placed and add up the power of the cards which are placed in their area of the lane.
If a player deals 3 damage or more to their opponent at any moment, the game ends immediately.
—description from the publisher