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