AisleRiot is one of the games that are pre-installed on a Ubuntu system. The name tells the game. It is solitaire.
This is not, what makes the game worth mentioning. I do not use the Menu too often while playing, therefore it took me sometime to recognize the menu entry »Game« → »Select Game«.
AisleRiot is not one game. It is 86 different games. As far as I was looking at the help files, all games were well documented. Therefore it is no problem to try all of them.
I have selected Freecell as the current game.