Here is the full list of all 74 Infinite Adventures achievements.
Royce Joins
Rescue Royce
Let Love Interest go
Summons Acquired 100%
Puzzle Rooms Completed 100%
Defeat Zander Gaiden
Defeat Mordekai Gaiden
Item Recipes Learned 100%
Complete All Quests and talk to Foster
Complete All Quests
Defeat The Ancient of Chaos Gaiden
Defeat Lyra Gaiden
Defeat Svolkoroth Gaiden
Defeat Lilith Gaiden
Defeat Agamon Gaiden
Defeat Balthazzar Gaiden
Defeat Tiberius Gaiden
Defeat Justicar Gaiden
Enchantments Known 100%
Wild Portals Unlocked 100%
Finish Game : Evil Ending
Finish Game : Good Ending
Defeat the Ancient of Chaos
Summons Acquired 50%
Bestiary 100%
Team Kessens Used 50
Rescue Main Character
Defeat Vith Uriel
Complete Chapter 5
Follow Love Interest into portal
Defeat Yndra
Defeat Kentu Asura
Jacinda Joins
Defeat The Prophet
Zander and Tonya Join
Victoria Joins
Complete Chapter 4
Regulus and Ejlora join
Defeat Xianglu
Rescue Victoria
Defeat Vith Zoral
Dinari Earned 1,000,000
Item Recipes Learned 50%
Bestiary 50%
Puzzle Rooms Completed 50%
Wild Portals Unlocked 50%
Complete Chapter 3
Defeat Lex Zero
Team Kessens Used 25
Complete 50% of Quests
Defeat Shi-Lorath
Hunt Rank S
Yokai Killed 50
Mine Rank S
Enchantments Known 50%
Complete Chapter 2
Defeat Sorcerer Modari
Gather Rank S
Decipher Rank S
Steps Taken 10,000
Enemies Killed 1000
Search Rank S
Unlock Rank S
Defeat Jacinda Brightflame
Summons Used 50
Yokai Killed 25
Dinari Earned 100,000
Enemies Killed 500
Complete Chapter 1
Defeat Jormandr
Summons Used 25
Defeat Butterbean
Steps taken 1,000
Complete Prologue