Here is the full list of all 100 H-Isekai Loves achievements.
Complete chapter 26
Use CURE POTION 10 times
Complete chapter 25
Use REGEN skill first time
Use HOLY SHIELD skill first time
Upgrade RAGE to max level
Acquire CURE POTION
Acquire BOMB
Acquire SHUFFLING
Use HEALTH POTION 10 times
Complete chapter 24
Use RAGE skill first time
Complete chapter 23
Acquire HOLY SHIELD skill
Complete chapter 22
Compete Mizkheal 1st Puzzle
Compete Mizkheal 2nd Puzzle
Compete Mizkheal 3rd Puzzle
Compete Mizkheal 4th Puzzle
Compete Mizkheal 5th Puzzle
Compete Mizkheal 6th Puzzle
Acquire RAGE skill
Use BOMB 10 times
Complete chapter 21
Upgrade REGEN to max level
Complete chapter 20
Complete chapter 19
Complete chapter 18
Complete chapter 17
Complete chapter 16
Complete chapter 15
Earn 500.000 Gold
Earn 1.000.000 Gold
Bring a party-member into a fight
Complete chapter 14
Defeat 100 monsters in the world map
Acquire REGEN skill
Complete chapter 13
Complete chapter 12
Use BLAST skill first time
Complete chapter 11
Use TELEKINESIS skill first time
Upgrade TELEKINESIS to max level
Upgrade CURE to max level
Upgrade BLAST to max level
Get the 5th buff at Tavern
Use SHUFFLING 10 times
Complete chapter 10
Acquire BLAST skill
Complete chapter 9
Get the 3rd buff at Tavern
Defeat 50 monsters in the world map
Use HEALTH POTION+ 10 times
Defeat 45 monsters in the world map
Acquire TELEKINESIS skill
Complete chapter 8
Use CURE skill first time
Acquire CURE skill
Complete chapter 7
Complete chapter 6
Complete chapter 5
Defeat 40 monsters in the world map
Defeat 35 monsters in the world map
Upgrade Critical Chance to max level
Use first Monster's Core
Complete chapter 4
Defeat 30 monsters in the world map
Defeat 25 monsters in the world map
Defeat 20 monsters in the world map
Defeat 15 monsters in the world map
Get the 1st buff at Tavern
Complete chapter 3
Defeat 10 monsters in the world map
Get a reward as [x10 gold] at the Wheel of fortune
Defeat 5 monsters in the world map
Acquire HEALTH POTION+
Acquire HEALTH POTION
Get the 4th buff at Tavern
Acquire your first Monster's Core from World map
Defeat your first monster in the world map
Get the 2nd buff at Tavern
Get your first full health meal at Tavern
Visit Tavern first time
Upgrade your MP first time
Upgrade your HP first time
Get a reward as item at the wheel of fortune
Get a reward as [x2 gold] at the Wheel of fortune
Visit Wheel of fortune
Complete chapter 2
Earn 100.000 Gold
Complete chapter 1
Earn 50.000 Gold
Earn 10.000 Gold
Complete tutorial
Combine 2 Star gems for the first time
Create your first Star gem
Create your first Vertical gem
Create your first Horizon gem
Create your first Cross gem
Create your first Circle gem