How to Play Rat Lab on Roblox: Escape as a Lab Rat

Rat Lab is a Roblox experience by Evil Science built around three roles sharing one facility: Lab Rats trying to break out, Scientists creating and testing mutations, and Police (Security) trying to stop escapes. The fastest way to learn the map is to play a Lab Rat and complete the full breakout, which teaches the routes every other role fights over.

Quick answer: Pick Lab Rat, chew through the cracked wall, hop tables and umbrellas over the yard fence, drop into the manhole, cross the sewer, and climb the red ladder to the Secret Rat Base to earn the Out of the Lab! badge.

Choose your role: Lab Rat, Scientist, or Police

When a server loads, the Choose Team screen offers three roles with opposed goals. New players should start as a Lab Rat because it carries the main breakout objective and shows you the whole facility layout.

Role	Goal
Lab Rat	Escape containment and take revenge, or be tested on
Scientist	Design custom mutations, then trial them on laboratory rats
Police / Security	Keep rats contained and retrieve any that get out

Tool progress is tied to time played and resets every session, so each new join starts you back at the beginning of the unlock ladder.

Launch Rat Lab and pick Lab Rat

Open the Rat Lab game page on Roblox and press the blue Play button. The experience is developed by Evil Science and supports up to 40 players per server.

Launching Rat Lab — The Rat Lab page on Roblox, where you press Play to join a server. Shown at 00:08 in Jeff Plays’s video. Image: Aliluma

On the Choose Team screen, select Lab Rat. You spawn inside a caged chamber as a numbered specimen, for example Specimen #223, with the prompt to escape.

Team Selection — The team selection screen with Lab Rat, Scientist, and Police. Pick Lab Rat to start the breakout. Shown at 00:21 in Jeff Plays’s video. Image: Aliluma

Close any update event pop-up, then run out of the starting cage chamber and follow the dotted path marker on the floor toward the exit.

How to escape the lab as a Lab Rat

You do not need a keycard to get out. Locked keycard doors are dead ends for rats, but the map has alternate openings that bypass them entirely.

Follow the trail marker until you reach the locked keycard door. Ignore it and look for the gap at the base of the wall. Slip through the chewed wall opening, marked with “Escape” and “Don’t Chew” text, to leave the interior.

Once you pass through the wall, the game flags you as WANTED with a short timer above your rat. Move into the sandy outdoor yard, where the main gate is locked.

Jump onto the stacked wooden crates, then hop up onto the picnic table umbrellas. Use the umbrellas to clear the chain-link perimeter fence and land near the Secret Rat Base sign.

Approach the manhole cover and press E to open it, then drop down the ladder into the sewer.

Cross the sewer tunnel by staying on the wooden planks, concrete ledges, and pipes. Avoid the toxic green liquid and keep moving toward the distance marker labeled ESCAPE.

At the far end of the tunnel, climb the red metal ladder. This brings you up to the surface at the Secret Rat Base and completes the breakout.

How to confirm you escaped

You know the escape worked when the system message reads “You are Out! You are a Criminal Rat – the Secret Base is yours.” Your role title changes to Criminal Rat, and you receive the “Badge Earned – Out of the Lab!” notification. The first rat to escape in a day also gets a DOUBLE PAY callout.

Weapons and tools at the Secret Rat Base

The base armory holds weapons and gear on wall racks. Access runs on playtime timers, and any Robux purchase can skip the wait either for the session or forever. The Combat Knife is free to grab right away.

Tool	Free unlock time	Notes
Combat Knife	Immediate	Free to take on arrival
Pistol / Baton	~5 minutes	Timed unlock during play
Body Armour	~10 minutes	Adds +50 HP while worn
Riot Gun / Riot Shotgun	~15 minutes	Shotgun, strong at close range

Weapon Rack Timers — Inside the Secret Rat Base armory, weapon racks show unlock timers and options to unlock for the session or forever. Shown at 00:14 in Cruffy’s video. Image: Aliluma

Because these timers reset every session, leaving and rejoining sends you back to the start of the ladder. If you want a tool available from the first minute of every session, a matching Forever pass is what carries over between joins.

Playing as a Scientist: create and test mutations

If you choose Scientist instead, your loop is to claim a chamber, build a mutation, and inject it into a lab rat. Start by claiming a numbered chamber and testing its console controls, which include Door, Light, Release Gas, Flood, and Incinerate on a Dummy Rat.

At the Create Mutations counter, choose a color, then grab a filled syringe from the mutation dispenser. Each syringe carries a specific mutation such as Explosive, Cyclops, or Long-Limb.

Creating Mutation Syringe — The mutation dispenser, where Scientists choose a color and collect filled syringes to inject. Shown at 00:50 in mrcone’s video. Image: Aliluma

Bring a rat into your chamber using the leash tool, then use Inject Subject to apply the mutation. Successful injections log the specimen in the Mutation Index and can award badges such as New Specimen. Applying a mutation is confirmed when the mutation’s description appears on screen and the rat’s model changes.

Injecting the Rat — Injecting a rat and unlocking a mutation, confirmed by the badge popup for the applied effect. Shown at 01:20 in mrcone’s video. Image: Aliluma

Getting captured and returning to the run

As a rat, Police and Security can leash you with a pole and drag you into a holding cell. When that happens, you are stuck on the leash inside the cell until another player opens the barred gate, at which point you can sprint back out into the facility.

Rescued from Cell — A captured rat in a holding cell with the gate opened, the moment another player frees you to rejoin the escape. Shown at 00:42 in Cruffy’s video. Image: Aliluma

Once you have the escape route memorized, you can return through the sewer with weapons from the base for a revenge run, or switch to Scientist and Police to see the same map from the other side of the containment fight.