There are spoilers, but come on, do you really care?
Story
Ichika has to go to a special facility to get his IS unit checked out while the girls enter some sort of virtual world to counter a cyber-attack into the IS Academy's network (trust me, I'm just as confused as you are). Meanwhile, the girls that don't enter the cyber-world have to confront a military group that attacks the academy, again for ill-defined reasons (doesn't this count as an act of war or something?).
Something that really annoyed me from Infinite Stratos 2 is that the story played awfully, awfully, awfully coy with its long-running plotlines and World Purge continues that trend by not bothering to explaining what the fuck is going and instead indulges in more harem antics. Yes, the girls use the virtual world to live out the personal fantasies with Ichika. I thought this was gonna be one of those stories where the girls had to choose between fantasy and reality because that would give the story and the characters some degree of pathos, but instead Ichika has to save them all on his own. Never, not even once, do the girls wonder if this is all good to be true. Common sense is thrown away for the sake of harem antics and that's just sad. (3/10).
Characters
No matter how generic and rudimentary a story is, it can always be elevated by how much you connect and relate to the characters, but unfortunately, World Purge forgets that and doesn't bother trying to get us to make the characters relatable. Yes, the harem antics are fun at first glance, but then you realize they are fake and they don't really teach you anything new about the characters, only that they're in love with Ichika.
The worst part I can say about World Purge is that the characters were painfully reactive this whole time. Nothing they do actually changes the course of events and when the story ends, the antagonist (wait, is Chloe an antagonist?) has already gained what she wanted, so the protagonists and the viewers are left wondering what the fuck what that all about. (4/10)
Art
One thing I can't fault World Purge about is the aesthetic values. The budget of the story really went into the fanservice and the action scenes, but they don't do much elevate the story. The action scenes involve secondary characters and the fanservice is distracting and doesn't compliment the story (other than showing that the girls are really into Ichika). (7/10).
Sounds
God bless the brave voice actors that partook in this steaming pile of garbage. Infinite Stratos doesn't deserve them. (8/10)
Conclusion
Infinite Stratos continues its downward spiral into mediocrity and obscurity with a story that didn't really add anything new to the grand scheme of things and when it does add something new, it's something obscure that will probably never be explained because we have no idea when season 3 will reach us. I'm telling you, Infinite Stratos is really showing its age in a time when anime is pushing boundaries of what the harem genre is really capable of. (5/10).
