I don't think there has ever been a sequel to a time-loop movie until now. Groundhog Day and Edge of Tomorrow are only one-offs although I hope Live.Die.Repeat. or whatever the heck you call it (I prefer All You Need is Kill) gets a number two but this sub-genre of "repeat" movies (sorry I guess my first try was a better descriptor) really is incredible so far. I saw an indie that also did the same gimmick. Unfortunately, it wasn't as good as these Hollywood movies (it had a tiny budget in comparison) but it did have a stellar explanation for why and it was still pretty darn cool. Shanda's River or Evil River is the title of that one (Italian indie horror!). Anyway, I was shocked how well they did with this sequel. The first film was excellent but I was quite curious what they would do with a sequel since it's very much uncharted territory. Like all good sequels, they kind of shift the genre too into more sci-fi comedy but it works brilliantly. Not scary really but great nonetheless.