It had such potential. James Bond... Indiana Jones... Cowboys... Aliens... Olivia Wilde! Unfortunately there wasn't enough action to make up for the mostly unoriginal and predictable script, and the script didn't require enough thought to make up for the less than exciting action. And there wasn't enough Olivia Wilde to make up for either of those. On the bright side, Harrison Ford decided to take the time to act in this film after he slept through the last installment of Indiana Jones.
Jake Lonergan (Daniel Craig) wakes up in the desert with no memory, but apparently he remembers to take down three armed men coming home from scalping some Indians. Thankfully he runs into Olivia Wilde (Ella Swenson) who inexplicably helps him regain his memory. It seems he forgot he was once a gang leader who fell in love with a hooker and then left said gang with a load of gold they had just stolen. Unfortunately he can't remember if he actually loved that hooker, but he's going to go risk his life chasing after some aliens for revenge anyway.
After that point you pretty much have to stop thinking, because you find out why the aliens are here. Although they live in a pretty barren spaceship, they're here for our gold because it's just as rare as where they're from. Although who knows what they're going to do with it. They walk around naked and the only possessions they have are guns and spaceships. Well, it's obviously they don't have much of a brain when you find out they're taking humans because they want to study their weaknesses, so they can wipe out the planet. Hello? You have laser beam shooting guns and spaceships and you're fighting people on the ground with guns and bow and arrows. Just blow them up!
P.S. Go see The Smurfs!