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