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Alien attackers from the Izar system are invading Earth! Battle the extraterrestrial menace in endless waves in this tribute to classic alien 'invader' shooters from the late '70s and early '80s. Aim for the high score by destroying the evil alien monsters!

Player counts over time, as we observed them.
Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology
| Month | Average | Change | Change % | Peak |
|---|---|---|---|---|
| November 2026Nov 2026 (so far) (from 8 Nov) | 0 | 0 | — | 0 |
| October 2026Oct 2026 (from 26 Oct) | 0 | — | — | 0 |
Average and peak concurrent players each month, and the change in average players from the month before.