Today Trials Fusion is the game offered by Microsoft at a discount price for their Countdown to 2015 promotion. The 50% discount is available on both consoles, Xbox 360 and Xbox One, with the difference that the older one will have the game and the Season Pass sold differently, while on Xbox One you will get all the game has to offer through its Deluxe Edition.
The Xbox 360 users can also get Slender: The Arrival for 4,99$. The next daily deal will be available tomorrow.
Countdown to 2015: Daily Deal #7
Source: Major Nelson