Solitaire. Everybody knows it, and everybody loves it even more when it involves hot anime girls. Simple, relaxing, and fun.
Simple, mouse-only controls
Optional 18+ version out - check forums for access information
Dozens of game modes, including the classics:
Original (Klondike) - Draw 1, Draw 3, and Two-Deck modes available
Free Cell
Tri Peaks
Spider - 1 suit, 2 suit, 4 suit
Pyramid
Some of the game modes are completely luck based and can get quite frustrating, the guides section has information about which modes are easiest to win, as well as a more thorough explanation of the rules of each mode.
Even though the game is listed as being only in English, the only text is the menu - if you already know how to play Solitaire, it should be okay in any language.
