FIFA 15's playable demo is now available on the Xbox One, with Xbox 360 and PC to follow in the next few hours. Regarding the Xbox versions, you will need to be Gold to access the demo, or wait for the 16th to download the demo as a Silver Xbox Live member. PS3 and PS4 users must wait until tomorrow to try the new FIFA out.
The demo includes two game modes - Kick-Off and Ultimate Team - plus eight teams to choose from: Barcelona , Boca Juniors, Borussia Dortmund, Chelsea, Liverpool, Manchester City, Napoli and Paris Saint-Germain. The only stadium available is Anfield Road, Liverpool's home, for 3 minutes halves.
FIFA 15 is coming September 26th, for most current platforms (except Wii U).