Encore Software apparently has a time machine, and it's not the one built into Leopard. They have just introduced three new entries in their Hoyle series of Mac games -- Hoyle Puzzle & Board 2009, Hoyle Cards 2009, and Hoyle Casino 2009.
Hoyle Puzzle & Board 2009 features puzzle games, including Sudoku, Anagrams, Hangman, Mahjongg, and over 1,200 crossword puzzles. The "Board" part of the game is actually Freeverse's Big Bang Board Games, which includes Backgammon, Checkers, Chess, and four more classic games. You can play against virtual or real opponents, and you gain Hoyle Bucks to purchase new music and backgrounds.
Hoyle Cards 2009 has hundreds of card games, and you can now play online against other card sharks in the Royle (sic) Suite. Hoyle Casino gives you slots, roulette, and all of the other casino favorites, now with access to the Royle Suite and online tournaments.
The games are available for $19.99 each and require Mac OS X 10.4.10 or later. Be sure to check out the system requirements before you buy, since some of the games require Intel processors, and then party like it's 2009!