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.
Collect 100 crystals
Activate the Wardenclyffe and save the world.
Kill 50 Shoggoths
Complete Chapter 3
Complete Chapter 2
Kill 50 Polyps
Kill 500 Fire Vampires
Choose an EPIC perk
Purchase a meta upgrade
Kill 200 Spawns of Dagon
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