It begins with the protagonist Otonashi awakening in a school yard next to a girl wielding a sniper rifle called Yuri. He has amnesia and asks her some simple questions to which she responds with insane answers, all the while keeping another distant girl focused in her sniper aim. He leaves the first and approaches the second targeted girl who proceeds to viciously slaughter him. He then awakens in an infirmary unharmed, amazed to be alive and so the story proceeds with him attempting to ascertain the truth of himself and the world and it's people around him.
The entertainment in Angle Beats comes in part from following Otonashi around this purgatory while questioning what the truth of this place is. Mostly the fun is in watching Yuri deliver her bizarre mission briefings to her mixed bag of followers, the intention of which is to undermine their enemy a small girl they call Angel. Light entertainment and humor is scattered throughout.
Character development is scarce and most if not all of them will be quickly forgotten afterward. This includes the protagonist who is the usual anime lead male archetype: always well intentioned, harmless, bland and totally dull. The only anyway slightly interesting or memorable person here is Yuri the purple haired girl on the center of the front cover.
Angle Beats comes across as somewhat schizophrenic. As though it was originally intended as a slightly dark exploration of personal, philosophical and theocratic concepts surrounding a self imposed purgatory. Then it was puffed out with lots of light humor and entertainment and the characters were mostly lobotomize. The final scene looks like something thought up after the creation of the original story, simply tacked on to offer a happy ending.
The animations are of high quality and the opening sound track is excellent (I give it four stars because of that).