Here is the full list of all 13 The Grizzled: Armistice Digital achievements.
Play the Tutorial
Finish the campaign
Finish the campaign without any defeat
Finish the campaign with 15 points or more
Win a game with only 1 card left in the Morale Deck
Win a game with no Hard Knocks
Win a game with 'Merry Christmas' as the last card played
Win a game with each Grizzled
Win a One-shot game in the 'Veteran' difficulty
Play a game with 3 other players
Win an Online game
Fully train every recruit available
Win a game after having 5 or more Hard Knocks