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