Good casual Shooter or RPG?

I am getting a bit bored of Fallout NV, Skyrim, Planetside 2, and War Thunder. What do you all recommend? Preferably under $20, old is fine. I dont want an intense game that takes a while to get into just quick easy fun. I used to play games like Brothers in Arms (all 3), BF4, and similar. Thanks for the help!

EDIT: I like story driven single player games more since I dont need an internet connection and after a 10 hr day dont want too much intensity.