Another recently popular game which may be of interest to HN is Android: Netrunner. It is an asymmetrical game wherein one player is the corporation who has a set of servers and is trying to advance adgenda cards while the other player is the runner, who is trying to hack into the corporation's servers with a set of programs, hardware and other resources. Like Magic, there is the actual game play, but then also the meta game play of picking cards to customize decks to play each role.
It shares the same designer as Magic (Richard Garfield), but is a Living Card Game rather than a Collectable Card Game. The difference being that in Magic you spend tons of money hoping for the random drop of particular rare cards or buy them individually from dealers. In A:NR, they release a new "data pack" about once a month and then have mini-expansions maybe once a year. It's more like a subscription model, but the net effect is that every card is worth the same as every other card. Still not a cheap hobby, but capped, at least (maybe about $175 to buy every card ever made up to today).
It shares the same designer as Magic (Richard Garfield), but is a Living Card Game rather than a Collectable Card Game. The difference being that in Magic you spend tons of money hoping for the random drop of particular rare cards or buy them individually from dealers. In A:NR, they release a new "data pack" about once a month and then have mini-expansions maybe once a year. It's more like a subscription model, but the net effect is that every card is worth the same as every other card. Still not a cheap hobby, but capped, at least (maybe about $175 to buy every card ever made up to today).
Anyways, someone built a RESTy API for it as well: http://netrunnercards.info/apidoc/en.html