Here is the full list of all 95 The Consuming Shadow achievements.
If you want something done properly...
Make the ultimate sacrifice
Cast the correct banishment ritual
Get the ideal result in all 12 random encounters that require equipment
Banish the Ancient with an incomplete ritual
Complete a dungeon without taking any damage
Die the first of many deaths
Press the wrong button
Escape the Ancient with your mind intact
Save the world at the cost of your mind
Whoops!
Let time get away from you
Unlock the Wizard
Unlock the Warrior
Achieve ending A with all four player characters.
Reach level 10 with any character
Lose a total of 1000 sanity points
Heal a total of 1000 health points with the medkit
Kill a total of 1000 enemy minions
Melee a total of 500 enemies to death
Complete 50 dungeons
Decrypt 100% of the bestiary
Find all diary pages
Successfully pick a total of 20 locks
Complete a total of 20 Ministry side jobs
Cast a total of 50 non-banishment spells
Kill a total of 50 minions with death spells
Deliver the heart
Rescue a total of 20 live, unbrainwashed prisoners
Complete the Scholar's challenge
Complete the Scholar's challenge with ending A
Complete the Ministry Man's challenge
Complete the Ministry Man's challenge with ending A
Complete the Wizard's challenge
Complete the Wizard's challenge with ending A
Complete the Warrior's challenge
Complete the Warrior's challenge with ending A
Complete the Biological Clock challenge as the Scholar
Complete the Biological Clock challenge as the Ministry Man
Complete the Biological Clock challenge as the Wizard
Complete the Biological Clock challenge as the Warrior
Complete the Biological Clock challenge with ending A
Complete the Amnesiac challenge as the Scholar
Complete the Amnesiac challenge as the Ministry Man
Complete the Amnesiac challenge as the Wizard
Complete the Amnesiac challenge as the Warrior
Complete the Amnesiac challenge with ending A
Complete the Caution Advised challenge as the Scholar
Complete the Caution Advised challenge as the Ministry Man
Complete the Caution Advised challenge as the Wizard
Complete the Caution Advised challenge as the Warrior
Complete the Caution Advised challenge with ending A
Complete the Pistol Whipper challenge as the Scholar
Complete the Pistol Whipper challenge as the Ministry Man
Complete the Pistol Whipper challenge with ending A
Complete the No-One Left Behind challenge as the Scholar
Complete the No-One Left Behind challenge as the Wizard
Complete the No-One Left Behind challenge as the Warrior
Complete the No-One Left Behind challenge with ending A
Complete the China Shop challenge as the Scholar
Complete the China Shop challenge as the Ministry Man
Complete the China Shop challenge as the Wizard
Complete the China Shop challenge as the Warrior
Complete the China Shop challenge with ending A
Complete the Scourge of the Ancients challenge as the Scholar
Complete the Scourge of the Ancients challenge as the Ministry Man
Complete the Scourge of the Ancients challenge as the Wizard
Complete the Scourge of the Ancients challenge as the Warrior
Complete the Scourge of the Ancients challenge with ending A
Complete a Daily Challenge as the Scholar
Complete a Daily Challenge as the Ministry Man
Complete a Daily Challenge as the Wizard
Complete a Daily Challenge as the Warrior
Complete a Daily Challenge with ending A
Reach level 10 of The Descent
Reach level 20 of The Descent
Kill 2 enemies with 1 armour-piercing bullet
Acquire all 12 pieces of equipment in one game
Banish the invading Ancient with at least 15 hours remaining on the clock
Kill a minion within half a second of it spawning behind you
Knock a total of 30 spit projectiles out of the air with melee attacks
Banish the invading Ancient with less than 10 minutes remaining on the clock
Attempt suicide 4 times in one game
Get a bleeding wound healed with less than 5 health remaining
Inject drugs 3 times in one game
Have 3 status ailments in effect at one time
Have 200 pounds in unspent cash
Discover a spell by incanting randomly
Place a Birth Star in a position that offers no bonuses
As the Ministry Man, banish Chzo, the God of Pain
Decrypt 50% of the bestiary
Get through Stonehenge with the Exhaust Muffler equipped
Shoot a total of 20 enemies to death while under the influence of anxiety
Kill a Cultist with a death spell
Equip the Body Armour, the Skateboarder Pads and the Stabproof Vest