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