The Arma Invaders achievement is unlocked by completing a hidden Space Invaders–style minigame that plays on Arma 3’s main menu
---------------------------How to Trigger the Minigame
Launch Arma 3 and go to the Main Menu.
Press the key assigned to the "Use Default Action" (commonly Enter, Spacebar, or Middle Mouse Button). Ensure this binding is active under Options → Controls → Common
If successful, you'll see a small M2A1 Slammer tank emerge from the bottom, the Arma 3 logo will shake, and the game (with a Steam discount box) will start playing
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Controls for the Minigame
Move left / right with A & D, or W & D (depending on your binding)
Steam Community
Fire using Spacebar or the "Use Default Action" key. You can hold the key down as firing has a 0.5‑second cooldown
Avoid clicking menu options or alt‑tabbing, as this will reset the minigame
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Gameplay & Strategy
The minigame consists of 14 levels, each corresponding to the base game or one of Arma 3's DLCs (Zeus, Karts, Helicopters, etc.). The final level brings back the Arma 3 base logo
You must destroy each game's/DLC’s logo without getting destroyed yourself
Enemies (like tanks, jets, drones) may repair the logo if they exit the screen; destroying unarmed vehicles (purple icons) can fully repair the logo if they reach it
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Tips:
Use a higher screen resolution for more maneuvering space
Prioritize destroying the logo over enemies, especially early on
Clear any leftover enemies (like karts or repair vans) after a level to avoid feeding repair kits to the next logo
On the final level, focus entirely on the logo; the boss "Miller" can dodge shots and isn't worth chasing
The minigame often appears during sales events, but can be manually activated anytime using the keybind method above
Some players suggest that owning all DLCs may be necessary for the achievement to register properly
From the Steam developer (via community discussion): "Load the Main Menu, wait for a little tank to appear from the bottom of the screen, then use A & D to move, and 'Enter' to fire at the Arma 3 logo." Ensure you don't have the -skipintro launch parameter enabled, and that the menu’s "world scene" or static background is visible
A Reddit user shared: “Honestly it’s super easy, I got it 2nd try. Some tips: – Ignore any enemies that come at you, they are not relevant and waste your time.”