On mobile but you can play Forza Motorsport 5 for free this weekend: https://mobile.twitter.com/XboxWire/status/507196522891472897
Xbox Live Gold Members Can Play Forza Motorsport 5 Free This Weekend on Xbox One
As we gear up for the launch of Forza Horizon 2 on Sept. 30, we’re excited to announce that all Xbox Live Gold members can enjoy Forza Motorsport 5 for free this entire upcoming weekend. Beginning at 12:01 a.m. PDT, Thursday, Sept. 4 through 11:59 p.m. PDT, Sunday, Sept. 7, Gold members in Xbox One markets can play the newest entry in the highest-rated racing franchise* of the past decade, Forza Motorsport 5, in entirety and for free.
They are testing out giving game trials through gold
If you can unlock achievements I am 100% for this
Getting closer and closer to my 25,000 each day
"You will also get to keep your Gamerscore and achievements earned while playing, so invite your Gold friends to play and see who has the best driving skill"