Here is the full list of all 27 Pillars of Eternity: Complete Edition trophies - there are 7 bronze, 13 silver, 6 gold and 1 platinum.
Congratulations! You have completed the game
Complete the game killing 1200 or more creatures and NPCs
You have completed Act III
Defeat the menace of Mowrghek Îen
Complete the Siege of Crägholdt quest
Stop the threat you saw in your dreams
Reach the reliquary in the Abbey of the Fallen Moon
Defeat the dragon that dwells in the White March
Kill the sky dragon and adra dragon
Visit every map (excluding those in The White March)
Defend your position as the master of Caed Nua
Complete all of the god appeasement quests
You have completed Act II
Restart the fabled White Forge
Complete all of the upgrades in the stronghold
Place 5 or more trap items
Attain rank 3 in at least three Dispositions
Apply 5 or more different enchantments
Recruit all companions (excluding those in The White March)
Complete at least 5 upgrades in the stronghold
Create 5 or more different food items
You have completed Act I
Create 3 or more different scrolls
Create 3 or more different potions
Pillars of Eternity Platinum
Complete the game killing fewer than 175 creatures and NPCs
Complete a Minor, Average, Major, Grand, and Legendary stronghold adventure