Full list of all 43 Immortal: Unchained achievements worth 1,650 gamerscore.
The base game contains 31 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 12 achievements worth 650 Gamerscore.
Finish the Lost Memories questline
Kill 100 enemies with a Pistol
Kill 100 enemies with the quick melee
Complete The Game
Enter Naylon World
Kill Malog. The raging storm
Upgrade a weapon to the highest level!
Kill Arlen. The corruptor
Kill Iska. Queen of the Abyss
Kill 100 enemies while attacking them in the back
Kill 100 enemies with an Assault Rifle
Recover 10000 or more bits from one death
Survived the attack on the Great Hall
After connecting the third nexus point
After connecting the second nexus point
Die from one of your own attacks
Kill 100 enemies with a Shotgun
Kill 100 enemies with a Sniper Rifle
Decypher an item
After connecting the first nexus point
Connect with the Monolith
Upgrade one of your weapons
Find an armour shrine
Get all achievements
Find all armour shrines
Equip an fully upgraded weapon in each weapon slot
Find all Lore Items
Kill 100 enemies with a SMG
Kill 100 enemies with a Launcher
Finish The Pilgrim's Pilgrimage questline
Finish The Lost Hunter Found questline
Complete New Game+
Complete New Game++
Complete New Game+++
Complete New Game++++
Get cursed while playing as The Cursed One
Finish a normal playthrough as The Cursed One
Get all curses while playing as The Cursed One
Defeat the lord of the Planar Barge
Kill the Drowned Commander
Collect all lore items in Storm Breaker
Kill 100 enemies with a lightning blaster
Finish the Nayra questline