Electro-Stunned is an achievement which is earned from stunning 6 enemies with a single Stun Grenade.


  • Stun Grenades are available only as the alternate fire of the Prototype Rifle, making this a Techs only achievement.
  • In Rydberg Reactor there are plenty of aliens behind the final door. Wait for it to open and shoot immediately. This also works with the Freeze Grenades for the Stay Frosty challenge, which you can carry at the same time, achieving both challenges at the same time.
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