Futuristic flick Ender's Game played its way to the top this weekend, though its $28 million isn't much to cheer about for Summit Entertainment, the Los Angeles Times reports; Ender aims to lead a new teen franchise, the Hollywood Reporter notes. In second place was the still-sprightly Bad Grandpa from prankster Johnny Knoxville, with $20.5 million, just a 36% drop from opening last week. Last Vegas, which sees the likes of Morgan Freeman and Robert DeNiro headed to a bachelor party, rolled a three with $16.5 million. And flying into fourth place was the 3D-animated Thanksgiving feature Free Birds. Gravity, meanwhile, landed in fifth, with $13.1 million, Entertainment Weekly reports.