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