Your inbox, reimagined as an invading alien fleet. For once, achieving inbox zero is actually satisfying.

Built in the style of Space Invaders, the descending-wave arcade shooter that defined the genre back in 1978 — fixed lanes, rows of enemies marching steadily downward, a single ship standing between you and the bottom of the screen. It became one of the best-selling arcade games of its era specifically because it introduced something new at the time: a difficulty curve that escalated automatically as you played, rather than staying flat. We've kept that exact rhythm intact and swapped the alien invaders for something everyone has genuine, deep-seated feelings about — your own inbox, finally getting what's coming to it.