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