ESO players can become eligible by filling out an online form between Dec. 3 and Jan. 10. A winner will be selected randomly for the prize on Feb. 1, Bethesda announced at The Game Awards. http://www.elderscrollsonline.com/en-us/news/post/2015/12/03/the-eso-millionreasonstoplay-s1000000-usd-giveaway
From the link:
Over the past few weeks, we’ve enjoyed reading all your #MillionReasonsToPlay #ESO that you’ve shared with us on Twitter, Facebook, the forums, and more. Because you’ve given us so much, we’d thought we’d return the kindness by offering you something in return. And by something, we mean $1 million (USD)!
In order to win our grand prize, you’ll need to register for the contest via our online entry form by January 10th, 2016. Then, just log into the game sometime between December 3rd, 2015 and January 10th, 2016. That’s it! If you don’t yet own ESO, now’s a great time to pick it up: The game is available for 60% off digitally from our store, along with Steam, PlayStation Network and Xbox Live – along with other participating retailers – now through December 7th.
And because we want to share the wealth with more than one lucky winner, we’re also awarding a heaping helping of crowns to other intrepid adventurers. Along with the million dollar prize, 1,000 lucky winners will be rewarded with 3,000 crowns each. You’ll be able to buy anything in the Crown Store including mounts, pets, costumes, DLC game packs, and more.
The grand- and second-prize winners will be randomly selected from all eligible entries on February 1st, 2016. For official rules, eligibility details, a no-purchase-necessary mail-in entry form and additional info, please visit this page.