Tic-Tac-Trailhead
An interactive Tic-Tac-Toe game launched at Dreamforce 2016 in support of the initial Trailhead launch Announcement. To date, this app has had over 10,000 downloads, and continues to be downloaded regularly, despite intending to be a 3-day ‘event special’.
If you want to play along, go download it from the Apple App Store Now.