Close Encounters is an achievement that requires you to kill 20 swarm with melee attacks in a single mission. This achievement is repeatable.
Tips[]
- Play a character with the Melee Damage Bonus skill (Jaeger or Vegas) and use the Power Fist for increased melee damage.
- Just before the Cargo Elevator exit, there's a container to the south where a Drone will spawn every few seconds on hard difficulty. Collect your 20 melee kills while your team guards your back.