Also available, Microsoft.com has Forza Horizon 2: Porsche Expansion DLC (Xbox One) for $2.50 for Xbox Live Gold Members. Thanks dave251
Note, must be Xbox Live Gold Member and be logged into Gold account to see sale pricing
Editor's Notes & Price Research
Each of these add-ons will require Forza Horizon 2 base game in order to play the additional content.
On sale again for $5 for Xbox weekly deals. Great addition to the full game! They also have many other sales this week as a part of their Xbox Deals with Gold for the week.
A new land of extremes awaits with the Storm Island Expansion for Forza Horizon 2! Blast your way through extreme weather conditions like tropical storms and thick fog and challenge Storm Island's sudden and severe terrain changes. The Storm Island expansion adds six iconic cars and trucks to the game, including a brand new barn find car, as well as off-road upgrades, 24 new championships including new off-road race modes like Brawl, Rampage, Extreme Cross Country and Gauntlet, additional Bucket List challenges, Xbox Live Achievements, online events, and much more!