Board and Card Games
Many popular board games and card games have computer versions. AI opponents can help improve one’s skill in traditional games. Chess, Checkers, Othello (also known as Reversi), and Backgammon have world-class computer programs.
Mahjong and related games are immensely popular in China and Japan. Go is popular in East Asia, though it is notoriously difficult to program a computer to play Go well.