The demo for FIFA 14 is out now on the Xbox 360 (queue it up for download here) and has since also arrived on the PS3. It released for PC yesterday through the Origin store.
Eight Teams are included in the demo which features Camp Nou stadium: Manchester City, Tottenham Hotspur, Barcelona, Borussia Dortmund, AC Milan, Paris Saint-Germain, Boca Juniors, and New York Red Bulls. Games have three minute halves with adjustable difficulty. The Practice Arena is accessible as is the opportunity to play around with some pre-made Ultimate Team squads.