I have two new entries: Xcom Enemy Unknown and Xcom 2. I can’t say there is an overarching storyline that is amazing: aliens invading the planet/aliens have set up a puppet human government, but I cannot stop watching.
It is a turn based squad level (4-6 soldiers) tactical game. There is also a base management aspect, researching to improve stuff, looking after the panic levels of the world. It is like watching tabletop Wargames at times, and you end up getting attached to the soldiers. It is really sad when they die, great when they sage the day, and just generally is enjoyable. I watch Christopher Odd’s let’s play.