Doesn't look like you will need to do anything for it, looks like it will just appear!
A few of our teams are working on special giveaways and in-game events in honor of our 15 year celebration. First up, the Forza team is gifting a 2017 Ford F-150 Raptor complete with a custom livery celebrating Xbox’s 15th anniversary. All players will receive this livery for free and Forza Horizon 3 VIPs will receive a bonus truck with an alternative Xbox 15th anniversary livery as well.
Also:
here will be two Rivals events created as well, with one in Forza Motorsport 6 and the other in Forza Horizon 3. In addition, there will be a special Bucket List Challenge in Forza Horizon 3 (TITLE: Celebrate #15YearsofXbox), which players can find by traveling to the Pink Lakes Bucket List point in the game.
And for Halo fans:
If you’re a Halo fan, if you simply log in to Halo 5: Guardians between November 15 at 10AM PT and November 22 at 10AM PT, you will receive a free “15th Anniversary REQ Pack”, which contains consumable items for use in Warzone game modes and the legendary Mark IV Gen 1 armor set, worn by Spartan IIs in the darkest hours of the Covenant War!
Read more at https://news.xbox.com/2016/11/15/celebrating-15-years-xbox/#…
Thanks to HUKD
Whoah! I was like.. is this the drive away price?