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