Men in Black 3 is the typical casual game in which you have to complete several missions in order to gain experience and money, then unlock new items, maps and weapons. If you like the genre, give it a try.
It's a shame the MiB theme tune wasn't included somewhere along the line. Instead, a generic hip hop soundtrack is on offer, but never seems entirely suited to the game. I need my 1990′s Will Smith cheese damnit.