A trailhead for the Jejune Institute.
Blending Fantasy with Reality Drives Successful Alternate Reality Games : Learning Solutions Magazine
make-an-alternate-reality-game by Jane McGonigal via Slideshare
Millions of People Around You Are Playing an Alternate-Reality Game You Can't See
Transmedia Storytelling and Alternate Reality Games | Jeff Watson
I definitely remember the Halo and Cloverfield ARGs. I had no idea about the other ones.
Extra Credits - ARGs Part I - What Are Alternate Reality Games?
Crowdsourcing the future: Can alternate reality game Superstruct help save the world? [Good high-level overview of Superstruct's game design and mechanics]
Ingress; One Million People Around You Are Playing an Alternate-Reality Game You Can't See;
Meet Lord Huron, a Musical Project That Is Also an Alternate Reality Game By NICOLE PERLROTH