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