Slay the Spire is a rogue-like deckbuilding game that has suprising depth to it. It doesn't require internet connectivity once downloaded so it's great for gamers with either limited bandwith or access to internet.
Due to the random elements the game is almost infinitely replayable because no two runs will be the same. It has sufficient difficulty modifiers that are unlocked by playing the game so that you can play to the difficulty you enjoy.