Here is the full list of all 56 We Slay Monsters achievements.
Avoid damage multiple times in a dungeon
Coimpleted a dungeon without using any abilities
Upgrade the Shoppe
Completed a dungeon in your starting equipment
Completed a dungeon at level 7 or below
Complete 13 dungeons with the Wizard
Upgrade the Wizard Tower
Fail a dungeon with a Warrior
Entered a dungeon with a Warrior for the first time.
Failed a dungeon with a Rogue
Entered a dungeon as a Rogue for the first time.
Upgrade the Barracks
Completed the Bar
Complete Chapter 2
Completed a dungeon at level 9
Upgrade the Bar
Completed a dungeon after landing many critical hits
Played a six card combo
Completed the Wizard Tower
Completed the Teachers Quarters
Complete Chapter 1
Raised 10,000 gold for the academy
Slayed every monster in a dungeon
Failed a dungeon with a Wizard
Kill 100 Monsters
Land many critical hits in a dungeon
Perform 5 4-card combos in a game
Revealed every tile in a dungeon
Complete a dungeon without using any potions
Played a five card combo
Kill 10 Monsters
Entered a dungeon with a Wizard for the first time.
Failed a dungeon with a Rogue 10 times
Complete 11 dungeons with the Rogue
Complete 12 dungeons with a Warrior
Upgrade the Teachers Quarters
Completed the Shoppe
Completed the Barracks
Played a seven card combo
Played an eight card combo
Kill 1000 Monsters
Killed yourself with a bomb
Complete dungeon with fully upgraded equipment
Perform 5 5-card combos is a game
Complete a dungeon after drinking a lot of potions
Complete a dungeon after playing only 2 card combos
Completed a dungeon without using multi card combos
Complete a dungeon on the third attempt
Completed a dungeon at level 8
Completed a dungeon that was failed three times or more
Raised 100,000 gold for the academy
Welcome to the Two Comma Club
Complete Chapter 3
Complete Chapter 4
Complete Chapter 5
You beat the campaign and slayed a bunch of monsters!