Here is the full list of all 20 Tesla vs Lovecraft achievements.
Activate the Wardenclyffe and save the world in Eldritch Plane.
Repel 100 Tentacles
Activate the Wardenclyffe and save the world in Aether Plane.
Kill 50 Shoggoths
Collect 100 crystals
Activate the Wardenclyffe and save the world.
Complete Chapter 3
Complete Chapter 2
Kill 50 Polyps
Kill 500 Fire Vampires
Kill 200 Spawns of Dagon
Purchase a meta upgrade
Choose an EPIC perk
Complete Chapter 1
Kill 50 Parasites
Kill 1000 Spiderghouls
Recover and Operate the Mech
123 Deep Ones must die.
Complete Tutorial
Recover lost Tesla Backpack