The The Frozen Wilds - Feats Add-on for Horizon Zero Dawn has 12 trophies - 11 bronze and 1 silver.
Applied a modification to your spear.
Killed 5 enemies using the Dismount Strike skill.
Used the Machine Repair or Mount Repair skill on 5 different types of machine.
Killed 15 Scorcher machines.
Killed 10 Frostclaw machines.
Killed 6 Fireclaw machines.
Disabled all Control Towers by overriding or destroying them.
Found all of the Pigments in the Cut.
Found all of the Animal Figurines in the Cut.
Traded Bluegleam for a special weapon or outfit.
Learned all of the new skills in the Frozen Wilds.
Reached player level 60.