Horizon Forbidden West

There are 43 different machine types in Horizon Forbidden West, 5 of which are Recon machines, although for the purpose of this trophy, you only need 4, as you can’t kill a Tallneck… you animal! Below is a list of the machines that you need to kill to unlock this trophy. The further down the list you go, the tougher the enemy, so bear that in mind. 

If you’re missing some, check out the All Machine Types Scanned   trophy for the actual order they are in the database, to see which one you’re missing.

Burrower
Skydrifter
Longleg
Redeye Watcher
Tallneck (cannot kill)