Here is the full list of all 38 Minion Masters achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Complete 100 Daily Quests
Complete 50 Daily Quests
Win 500 Ranked Battles
Use 250 Power Tokens
Use 100 Resource Tokens
Complete 25 Daily Quests
Complete 10 solo challenges
Complete 30 Achievements
Use 100 Power Tokens
Use 50 Resource Tokens
Win 100 Ranked Battles
Acquire a collection of 150 cards
Win a Ranked battle with 8 different Masters
Play a friendly challenge with 3 different friends.
Craft a Legendary card
Complete 5 solo challenges
Play 5 spells in a row during a Ranked Match and then win
Complete 10 Daily Quests
Use 20 Resource Tokens
Craft a Rare card
Win 50 Ranked Battles
Complete 3 Daily Quests
Complete 15 Achievements
Watch a replay
Win a Ranked Battle with less than 100 Health left
Reach the Silver League
Use 25 Power Tokens
Complete 5 Achievements
Win against 8 different Masters
Craft a Supreme card
Win 10 Ranked Battles
Acquire a collection of 100 cards
Reach the Bronze League
Reach the Stone League
Create 3 decks
Craft a Common card
Win 3 Ranked Battles
Acquire a collection of 50 cards