They aren't that uncommon outside of physical stores, where board game nerds gather - off the top of my head I can think of at least three similar multi-game decks: Everdeck [0], Badger Deck [1], and Singularity Deck [2], while a cursory search nets me another dozen or so [3].
There's also the Decktet [4], of course, even if it takes a very different approach than the rest (for one thing, it does away with traditional suits - it is a very interesting deck, and one I really like).
Just bought the decket and the book based on your recommendation. It looks neat. I've recently gotten into card games with my kid and it's a lot of fun. I'm hoping these games are half decent as well. Have you played many?
On another note, I've really enjoyed finding one-player games that use a standard 52-card deck as well. There's a ton of interesting games out there.
On another note, I've really enjoyed finding one-player games that use a standard 52-card deck as well. There's a ton of interesting games out there.