Southpark stick of truth (was like $10 on steam sale yesterday)
Assassins creeed black flag
Farcry 3
Watchdogs
some other games
http://shop.ubi.com/store/ubina/en_US/html/pbPage.BOGO
if you like the tropico series this is a good opportunity only till midnight though.
according to reddit they come with steam keys 2nd hand info though.
south park comes with steam key, watchdogs does not.
the price for tropico shows 39 but it is 14 when you click on it.
