Astraware Solitaire features 12 of the most well-known and best-loved single player card games, chosen based on direct feedback and suggestions from Astraware customers. The games are Klondike, Pyramid, Spider, Clock, Yukon, Canfield, Four Seasons, Sultan's Harem, Idiot's Delight, Golf, Calculation, and Freecell, and to make the playing experience both familiar and fun, each game has custom gameplay options so everyone can enjoy the games using their favorite variation on the standard rules.