Here is the full list of all 55 The Banner Saga 2 achievements.
Complete the game on Hard difficulty.
Complete the game on Hard difficulty level without losing a single battle.
Prevail with Rook against overwhelming numbers.
Meet King Meinolf with Alette.
Witness Eyeless possess 10 fallen units.
Acquire 3 rank 10 items.
Defeat 3 enemies with Zefr.
Defeat 3 enemies with War Bear.
Kill 5 enemies while stealthed.
Defeat 3 enemies with a Wanderer.
Complete the game on Normal difficulty.
Complete the game without letting anyone in your caravan die to hunger.
Complete the game without ever getting low morale.
Break 30 barricades in a single playthrough.
Meet King Meinolf with Rook.
With 6 Rank 10 units, win a Hard difficulty sparring battle in the Training Tent.
Bring 400 clansmen safely into Arberrang.
Reach Arberrang in 100 days or less.
Visit the godstone Lauga.
Fight 32 battles in a single playthrough.
Maintain an alliance with Rugga.
Kill a Sundr.
Bolverk always acts as the Ravens expect.
Reach Oldford with at least 20 Varl following Bolverk.
Complete Holfi's Training.
Visit the godstone Bygglaerer.
Build an army of over 600 trained fighters.
Kill 5 in one turn with Cull the Weak.
Visit the godstone Geirraðr.
Defeat 3 enemies with a Female Horseborn Cantref.
Defeat 3 enemies with a Male Horseborn Teulu.
Complete Sven's Training.
Visit the godstone Vez'nan.
Defeat 3 enemies with a Tracker.
Defeat 3 enemies with a Slaughterer.
Visit the godstone Baldringr.
Defeat 3 enemies with an Axe Thrower.
Visit the godstone Irynx.
Defeat 3 enemies with a Shieldmaiden.
Defeat 3 enemies with a Berserk.
Visit the godstone Aselei.
Defeat 3 enemies with a Poet.
Import Save Game from Banner Saga 1.
Survive with only female Heroes. (Normal or Hard Difficulty)
Survive with only human Heroes. (Normal or Hard Difficulty)
Survive using only parties of 4 varl in every battle. (Normal or Hard Difficulty)
Survive all battles on Easy.
Survive with fewer than 20 Heroes dying. (Normal or Hard Difficulty)
Survive all battles on Hard.
Survive without a single Hero dying. (Normal or Hard Difficulty)
Survive without using the Horn for willpower. (Normal or Hard Difficulty)
Survive without Recruiting Heroes. (Normal or Hard Difficulty)
Survive Hard Mode without a single reload
Survive all battles on Normal.
Survive in less than 180 minutes for your total turns. (Normal or Hard Difficulty)