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