You can download Cribbage Plus! for free, but registering the game (priced at $12) unlocks extra features, including more skilful opponents. This is a nice looking cribbage game, with a beautifully-drawn cribbage board, and some unusual twists which lift it above the average computer cribbage game.
Instead of scoring points for 15s, you can opt for other numbers - or even make it a random number for each hand. You can also change the 31 score to any number you like. You can swap cards with your opponent if you wish, and even peg points in the play for flushes!
You don't have to use these options of course; out of the box, Cribbage Plus! plays standard cribbage, but it's nice to see such original features in a cribbage game.
Unregistered users play against Novice Nelly, not the strongest of cribbage players, but a good challenge for beginners. Once you've registered, you can select from The Professor (an expert level player), or even God (what's that? God plays cribbage? Of course He does!)
Another original feature of Cribbage Plus! is the achievements system; every time you complete one of the goals such as 'Score a 24 hand', or 'Defeat the Professor 6 times in a row', you unlock new tablecloth designs to play with instead of the traditional green baize. Some of these are extremely difficult ('Score a 28+ hand') but will keep you playing, possibly for years to come.
Cribbage Plus! is a quirky, fun game with a good sense of humour, and an excellent way for beginners to learn cribbage, and experts to sharpen up their skills. Recommended.