As a dedicated Roblox Animal Hospital player, nothing felt more rewarding than finally getting Ratthew’s Key and unlocking the hidden basement area. This secret key opens up exclusive rare animals, high-paying emergency missions, and special treatments that significantly boost your hospital earnings. If you’ve been struggling to find it, this straightforward guide will help you get it quickly.
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Table of Contents
Roblox Step-by-Step: How to Get & Use Ratthew’s Key
| Step | What to Do | Helpful Tip |
|---|---|---|
| 1 | Reach Level 10 | Focus on daily tasks and healing pets |
| 2 | Find and talk to Ratthew the Rat | He’s near the back animal cages |
| 3 | Accept the “Lost Key” quest | He’ll ask you to recover his missing key |
| 4 | Search the Storage Room | Check behind the big blue medicine shelf |
| 5 | Use the key on the metal basement door | Located on the far left side of the map |
Once you unlock the basement, you’ll gain access to exotic animals like snakes, monkeys, and even legendary creatures that give huge bonuses. The key is reusable, so you can enter the basement anytime after the first unlock.

Pro Tip: Complete this quest during Double Money or Double XP events to maximize your profit from the new animals. The basement missions pay almost twice as much as regular ones.
Ready to grow your hospital empire? Check our complete Roblox Animal Hospital Guide & Best Strategies or visit the Roblox Hub for more tips and updates.
FAQs
Where exactly is Ratthew’s Key located?
It is hidden in the Storage Room behind the large blue medicine cabinet after you accept the quest from Ratthew.
What does Ratthew’s Key unlock in Animal Hospital?
It opens the secret basement that contains rare animals, special treatments, and higher-paying emergency missions.