Published by Atari in 1982, it offers a fixed shooter where killing the demons crossing the screen turns them into diamonds that add to your score, while you have to avoid hitting an angel that appears intermittently or lose lives. That distinction between "good" and "bad" targets within the same wave adds an extra layer of attention to the genre's usual reflex shooting.
It ended up as one of the more low-key shooters in Atari's official catalog, overshadowed by titles with stronger visual identities, but it retains that "choose carefully who you shoot" design that sets it apart from the horde of Space Invaders clones of the era.

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