XB1: Forza Horizon 2 (Aug 1-31)
Released in late September of 2014, Forza Horizon 2 put up big review numbers from a number of sites, ending up with an overall Metacritic aggregate score of 86%.
Featuring over 200 cars, the game sold over 2 million copies on the XBox One and Xbox 360 systems combined.
XB1: For Honor (Aug 16 - Sept 15)Allowing for up to 8 players, the ambitious third-person action/adventure title For Honor was released in February 2017. Critics liked it. Players were indifferent.
Pretty much par for Ubisoft's mid-2010s course, really. But, hey. At least it's free!
X360: Dead Space 3 (Aug 1 - 15)
With come-and-go multiplayer campaigns, link up with your friends whenever their around and continue the mission whenever they're not.
The game garnered review scores best described as "all over the damned place," prompting the cancellation of Dead Space 4, which remains a sore spot for fans of the series.
X360: Disney's Epic Mickey 2 - The Power of Two (Aug 16 - 31)Yay?
NOTE: Assault Android Cactus and Death Squared are still available for Xbox One through August 1, as are Tom Clancy's Splinter Cell: Conviction for both the Xbox 360 and Xbox One.