Twitch Prime members have new loot to grab including Oxenfree, NBA2K17, and a "Star Wars: The Old Republic - Eternal Throne Ultimate Pack." There are only 3 days left to get Oxenfree and the Star Wars pack, but NBA2K17 ends on the 22nd.
I personally don't know anything about these games, but I thought I would bring it to your attention. You have to create a STWTOR account to claim the code, which I did. I downloaded the setup file, but that's as far as I've gotten.
I've downloaded other games offered by Twitch Prime including Punch Club (recommended by Jon) and This War of Mine. TWoM appears to be similar to Fallout Shelter, so I want to give it a try. It also seems to have some great reviews.
Login to your Twitch account (if you've already linked up with your Amazon account) and check out the notification.