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