Solitaire is a classic Klondike Solitaire card game. Solitaire is so fun and popular that people all over the world enjoy playing it to relax. When people say "solitaire," they're usually referring to Klondike Solitaire. Klondike Solitaire is the most popular and classic Solitaire game compared to other Solitaire games like Spider Solitaire, FreeCell Solitaire, Pyramid Solitaire, and TriPeaks Solitaire. Solitaire games, also known as Patience in Europe (such as the United Kingdom, France, etc.)