Really easy achievement, use your melee weapon and hit someone till they get eliminated. Probably easier if you get there health low then finish them off using the melee.
“The easiest way to do this is just afk the flight down to the map and you will land in the exact same place as other afk-ers. You will start with your melee so just kill whoever you land next to. Took me 20 seconds to get this cheevo”
Thanks Nerdy Penguins