I've been playing Card Hunter, to the exclusion of nearly all else, for about a month and a half now. It's a free-to-play, half-strategy, half-rpg kind of deal. It's a deck-and-card based game, but there's a really clever equipment-as-cards paradigm that prevents this from turning into a may-the-best-card-win kind of affair. The writing isn't exactly subtle, but if your childhood involved sitting around a table with your fellow nerdlings trying to figure out the practical difference between "ration, standard" and "ration, iron", then the game was written with you in mind.

Right now, there is a waiting list to get in on the beta, but I've got a single key to share with a fellow gamer. Three things to keep in mind about said beta key:

1. The game is in beta, and everything that implies - cards will be tweaked, game rules will be adjusted, you will find bugs, etc.
2. The game's database will be reset at least once more before the launch - everything you earn now will be gone on launch day.
3. The in-game currency of pizza slices is available for purchase now, and can be used during the beta. Upon each database reset, all of the pizza you've ever bought will be re-credited to your account for you to spend all over again, just as you please.

The One Key will be given to the first poster to ask for it. Cheers!