Reviewing a two-part movie is an awkward business. For part one, I end up writing a midterm progress report, with no thumbs up or down for whole shebang. Part one may be bad, but prejudging part two would be wrong.
In writing about part two I can turn my thumb any way I want, but I can't avoid spoilers for part one. So you if haven't seen "Gantz," in which former boyhood pals Kei Kurono (Kazunari Ninomiya) and Masaru Kato (Kenichi Matsuyama) play a bizarre kill-the-aliens game in an afterlife limbo, this review of the action-packed if disappointing followup, "Gantz: Perfect Answer," may tell you more than you want to know.
Still with me? As part two begins, Kei, the once wishy-washy college boy, has become a stern warrior in the service of Gantz, a black sphere that brought him and Masaru inexplicably back to life after a fatal encounter with an oncoming subway train. He and others among the newly dead accumulate points by killing aliens on missions assigned to them by Gantz. With 100 points, they can either escape their limbo and lose all memory of their time there or return another person to life.