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