Here is the full list of all 57 Oaken achievements.
Finish the tutorial.
Defeat 20 enemies with the Lady's attack.
Create 50 .
Finish the first chapter.
Finish the second chapter.
Finish the third chapter.
Finish the game with the Lady on any mode.
Finish the game with the Lady on Expert mode.
Unlock all cards and items.
Have an enemy Ensnared for its 2 consecutive turns.
Deal at least 12 damage in a single hit.
Defeat at least 6 enemies in a single turn.
Defeat 3 targets at the same time with Aya's ability.
Defeat 6 enemies with Aya's Spiky Seeds during a single battle.
Shoot with Aya 3 times during a single battle.
Have an enemy be affected by Enju and 2 other Defenders at once.
Gain Strength from Enju's Miracle Cure at least 6 times in a single turn.
Inflict at least 12 Weakness on enemies in a single turn.
Outsmart enemies Weakened to 1 Attack 12 times.
Slay a unit with at least 10 health with a single attack from Kusta.
Push a single enemy to another hex 3 times in a single turn.
Heal allies with Baralai's Mossy Cover 25 times.
Move with Baralai at least 5 times in a single turn.
Create 8 in a single turn in the Oak's Crown.
Block unearthing enemies with other enemies 10 times in the Hollows.
Destroy 4 Amber Prisons in a single turn in the Amber Falls.
Defeat the boss in the Amber Falls after surviving a direct hit from the shattering of his shell.
Defeat the boss in the Oak's Crown after defeating at least 10 of his followers.
Defeat the boss in the Hollows after having him defeat at least 3 of his own allies.
Stabilize a full hand of spells 3 times in a single playthrough.
Hit enemies 20 times with Raiku's Raving Foci in a single battle.
Copy spells stabilized by Raiku 10 times during a single playthrough.
Have an elder spirit with max level and a unique Wisp.
Have at least 6 base Attack with your hero.
Defeat the boss in the Valley of Thorns after making him defeat at least 3 of his own allies with his attacks.
Collect at least 10 Spikefruit in the Valley of Thorns in a single playthrough.
Slay a boss with Enju.
Defeat 10 Voiceless enemies with Deigo's Enchanted Beads during a single playthrough.
Travel a distance of 20 hexes with your hero in a boss or elite battle.
Have a single unit deal damage with Deigo's Enchanted Beads 5 times in a single turn.
Summon allies in Deep Water 12 times in a single playthrough.
Defeat the boss in the Seas of Serpents after outsmarting it at least 6 times.
Visit each biome.
Defeat the final boss without exhausting any cards.
Finish the game with Kidu on Mastery 6 or higher.
Save the tiny Tinker in 4 different locations.
Finish the game with Kidu.
Playing as Kidu, defeat 30 enemies with Blaze in a single playthrough.
Playing as Kidu, cast a spell or a skill boosted with 9 Embers.
Playing as Kidu, win an elite or boss battle without summoning any allies.
Playing as Kidu, create 40 Embers on the ground during a single playthrough.
Hit 4 units with a single Black Puffer in the Roots.
Defeat the boss in the Roots after defeating a Shadow Clone that has at least 15 health.
Complete the bonus ending.
Convert 15 Voiceless enemies in a single playthrough.
Defeat a boss while you have 8 or less max health.
Defeat 50 enemies with Pathfinder's Eclipsed Tears in a single playthrough.