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