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