Here is the full list of all 42 Alina of the Arena achievements.
Unlock all achievements
Complete a run without equipping any accessories
Play more than 16 cards in a single turn
Receive more than 25 Fatigue in a fight
Win a fight with 1 HP left
Complete a run under 40 minutes
Upgrade one weapon 5 times
Defeat a champion in 3 turns
Have more than 5 different Statuses in your deck
Gain more than 100 Focus in a fight
Kill 6 enemies in a single turn
Possess more than 2000 gold
Stack more than 30 Bleed on a single target
Throw a rock more than 5 times in a fight
Perform a 12 hit combo
Immobilize a single target more than 3 times in a fight
Stun a single target more than 5 times in a fight
Stack more than 200 Burn on a single target
Complete a run as a Mercenary
Complete a run with at least one cursed weapon equipped
Gain more than 200 Block in a fight
Complete a run as a Deprived
Kill 3 enemies in a single attack
Complete a run as a Bandit
Complete a run in Hardcore Mode
Deal more than 300 damage in a single attack
Gain more than 25 Strength in a fight
Hurl a Gemstone
Defeat a champion without taking any damage
Conquer the Slave Arena
Conquer the Underground Arena
Conquer the Royal Arena
Defeat the Demon of the Arena
Unlock all cards
Encounter every type of enemy
Complete a run as a Slave
Complete a run as a Warrior
Complete a run as a Hunter
Complete a run as a Pyromancer
Complete a run as a Samurai
Unlock all accessory slots
Unlock all item slots