THIS METHOD WORKS IN 2024Currently this is only known to work for PC players.
-From the main menu go to Online and join a game. Join any game and wait till the game actually starts and you load into the match.
-Now you need to be disconnected from the lobby. You can do this by disconnecting your WiFi, unplugging your ethernet cable, or disabling your ethernet adapter in Control Panel. When you disable your internet you will need to try and move around for it to fully disconnect you.
-You will then be back at the menu. Go to "Practice" which is located under Local and Online Play.
-Choose MiranHQ
-You can now go back online so you can use the achievement tracker. If you do not reconnect online, your kills will not track.
-In MiranHQ you can go to the laptop and click customize on the able and switch to imposter by checking MedBay>Be_Imposter.exe.
There are 6 dummies around the map you can kill with a 15 second cool down between each kill. Once you kill the 5th dummy, they will all revive so you can do this endlessly until you reach the achievement mark.
If being focused, this should take you 13 minutes with 1 kill every 15 seconds.
This method is also the best viable method for getting SCOURGE