Here is the full list of all 48 Remaya Idle achievements.
Reach Knowledge Level 15.
Enter 25 Dungeons.
Use 100 Books.
Destroy 10000 Targets.
Acquire 100 Legendary Items.
Enter 10 Dungeons.
Destroy 5000 Targets.
Use 1000 Potions.
Reach Knowledge Level 5.
Gain 100 Equipment.
Enter a Dungeon.
Destroy 2000 Targets.
Use 500 Potions.
Rebirth 1 time.
Destroy 1000 Targets.
Reach Level 100
Gain 25 Equipment.
Acquire 10 Legendary Items.
Use 25 Books.
Reach Level 75
Destroy 500 Targets.
Use 100 Potions.
Reach Level 50
Acquire a Legendary Item.
Use a Book.
Reach Level 20
Use 25 Potions.
Destroy 100 Targets.
Gain an Equipment.
Reach Level 5
Use a Potion.
Reach Level 200
Reach Level 300
Reach Level 400
Reach Level 500
Gain 500 Equipment.
Use 500 Books.
Enter 100 Dungeons.
Acquire 1000 Legendary Items.
Reach Knowledge Level 30.
Reach Knowledge Level 50.
Reach Knowledge Level 75.
Reach Knowledge Level 100.
Rebirth 3 times.
Rebirth 7 times.
Rebirth 15 times.
Rebirth 30 times.
Rebirth 50 times.