As you may be aware, Microsoft’s offering for free-to-members games is slightly different from Sony’s PS Plus.
Rather than dropping all the month’s games at once, Xbox rotate the new ones in so you get a nice treat mid-month, and right now it’s the turn of Trials Fusion to come into the fold.
Queue up your download using Xbox.com at this link.
There’s plenty of DLC for the game, so here’s hoping the season pass goes on sale, too.