Here is the full list of all 41 Grimshade achievements.
Each hero faced the Terror Weaver and survived the battle
Complete the game without using any Utility skill (except the tutorial)
Save Gabriel
Complete the game without decreasing the difficulty level
Reconcile Dolly sisters
Start the battle with four heroes and complete it with lone survivor
Use medical supplies 50 times on a single run
Each hero inhaled the Wailing Horror miasma and survived until the end
Each hero took a fight with Wilhelm and made it
Help the Lambent Mother to find the source of the Darkness invasion
Avenge for the Capitan Brann
Complete all quests given by Flux
Crack the Red Card mystery
Save Undina
Complete the game with no one fallen in battle (except Alister)
Leave Lilypond
Vanquish the Terror Weaver
Obtain the Black Water
Pick up all the scrolls in Arthu's Mansion
Reconcile two Moo'Shoe clans
Light all of the totems
The Moo'Shoe War: the Purple survived
The Moo'Shoe War: the Green survived
Solve all Hexagarial's riddles
Get some coins from a mushroom
Collect all Disks of Time
Peculiarities of pronunciation
Cure Charlie
Defeat the Elder Beast
Learn that Eleores have no children
Vanquish the Wailing Horror
Leave the Kingdom of Brann
Defeat King Wilhelm
Visit Eleore catacombs
Locate and destroy the sabotage group
Detonate a grenade in the basement
Tell your friends about the nightmare with corpses.
Brake two water pumps
Examine 100 interaction objects with descriptions
Rescue Alister's Mom
Meet Kiba