I've been playing a bit of Earth Defense Force 2017. So far I'm loving it. It's a very pick up and play game, which works very well in short bursts. There are more than 50 missions and most of them take around 10 minutes or less to finish. The game has a very B-Movie / Monster movie vibe too, which is awesome.
The only thing that's annoying are your squadmates. They run in front of you when you fire and constantly shout stuff like EE DEE EFF - EE DEE EFf. Luckily you can just shoot them and you won't get penalized for it.