Battle: Los Angeles is pretty good if you can overlook the somewhat fantastical setup. It's basically "What if aliens showed up tomorrow in the real world and started attacking cities?" and follows a group of soldiers sent in to evac civilians in what's basically become no man's land in Los Angeles. They're scared and not quite sure what they're fighting against or how best to deal with it, but they're still trained soldiers and they're defending their home so they look out for each other and do the best they can. It's probably the closest we'll ever get to a real XCOM movie, and I feel like it's fairly underrated.
