Here is the full list of all 50 Foregone achievements.
Collect all Trophies
Max all possible nodes in Skill Mastery
Spare Project Zeus
Acquire all Skill Upgrades
Equip a Mythic item in each active slot
Upgrade a Mythic item to Level 5
Kill Project Zeus
Defeat Project Zeus
Acquire all Diary Pages
Acquire all collectibles
Defeat the revived Project Poseidon
Discover all secret locations
Acquire all Military Reports
Defeat the revived Project Demeter
Kill 10 enemies before Barrier's duration runs out
Acquire all Lab Notes
Defeat the revived Project Hera
Acquire all Commander's Logs
Max all possible nodes in the Skill Tree
Hit 6 enemies with one Raze
Damage 8 enemies with one Nova
Defeat an elite enemy inside Bastion
Discover all secret locations in a level
Uncover a secret location with Ground Smash
Ascend to a secret location with Wall Climb
Discover the Warden's plan
Complete a branch in Skill Mastery
Acquire all Abilities
Defeat Project Poseidon
Learn the truth of the Arbiters
Acquire all Catalysts
Acquire a Skill Upgrade
Acquire all Skills
Defeat the King of Calagan
Defeat Project Demeter
Defeat Tecton
Kill 5 enemies with a single use of Overdrive
Upgrade an item
Complete a branch in the Skill Tree
Reminisce at the Courtyard
Defeat Project Hera
Damage 4 enemies with one Surge
Destroy the Buzzbot
Speak to the Ferryman
Acquire a Catalyst
Allocate Essence into the Skill Tree
Heal with Restoration in mid-combat
Discover a secret location
Acquire a collectible
Complete the Prologue