Over "The Air" Achiever Achievement
Over "The Air" Achiever25
Summon the Achievement Bot.
You will need a Twitch account for this one. Once you have created and logged in to Twitch, go to your settings and make sure that your Twitch settings are set to chat and hashbombs, then choose a Twitch feed to link your game to (it can either be one you host or any random one you want to join).
Once those two settings are complete, create a game, boot up Twitch in the background/snap, and type #achievement into the chat. Go back into your game and the achievement bot will be summoned (a big dude that kinda looks like Magneto will appear, and the feed will tell you "[Twitch Username Here] has summoned the Achievement Bot"), unlocking the achievement.