Roblox Terminal Escape Room Chapter 4, titled Trial & Error, traps your team inside a contaminated research facility. The room gives players a 90-minute timer before the ceiling sprinklers spray corrosive hydrochloric acid across the entire lab. While Standard Mode relies on randomized tables and complex calculations, Beginner Mode provides fixed clues, simplified mini-games, and reworked escape paths.
Escaping the room requires gathering dominoes and water bottles, solving sequence keypads, and traveling through shrink platforms to unlock the central fume hood.
Phase 1: Gathering Dominoes and Water Bottles
To access the machine controls, you must first collect all domino tiles scattered around the laboratory. Three separate stations hold dominoes and water bottles.
The Crossword Puzzle Display
Locate the wall keyboard across from the chemical station. The clues correspond to scientific lab terms and classic games:
- A game you play with X and O's: TICTACTOE
- A type of table you might see in the lab, but you shouldn't eat on: PERIODIC
- The blank room (written in red): GAME
- There are eight of these in the lab that you can place on a scale labeled A to H: MIXTURE
- Which element on the chemical shelf is radioactive, flammable, and explosive: URANIUM
- These might have dots, but they aren't dice: DOMINOES
- Number seven clue: SEVEN
- Dark and light squares make up this game board, but it isn't chess: CHECKERS
Reading the red highlighted letters from left to right spells MOCKING. Enter MOCKING into the display to collect your first set of dominoes and a water bottle.
The Dice Keypad
Near the chemical area sits a keypad with a dice poster. Locate the four multi-sided dice scattered around the room and note the number on the top face of each die, ordered by increasing side counts:
- Cube (6 sides): 4
- Octahedron (8 sides): 5
- Dodecahedron (12 sides): 9
- Icosahedron (20 sides): 1
Enter 4591 into the keypad to retrieve the next batch of dominoes and another water bottle.
The Sudoku Keypad
On the opposite counter by the dollhouse, inspect the solved Sudoku board. The poster instructs you to inspect the 3x3 center grid. The keypad has blank buttons where the numbers used to be. Press the blank buttons corresponding to where numbers 1 through 9 sit within that center 3x3 grid:
- Top-row right
- Top-row middle
- Middle-row right
- Top-row left
- Center middle
- Bottom-row left
- Bottom-row middle
- Middle-row left
- Bottom-row right
Entering this sequence opens the compartment, granting more dominoes and a water bottle.
Raising the Final Domino and Chain Assembly
Pick up the loose water bottle sitting near the mass scale. Walk to the tall glass cylinder in the corner holding the submerged domino. Pour each collected water bottle inside until the water level rises to the top, allowing you to grab the floating domino.
Head to the domino tabletop. Arrange the dominoes end-to-end so touching halves match identical numbers (such as matching a 5 to a 5). Completing the board leaves you with exactly one leftover domino piece. Insert this spare domino into the sensor slot on the fume hood to power the power systems.
Phase 2: Activating the Teleporters and Shrink Chambers
Press the button beside the fume hood to reveal the nine-digit sequence console. The board displays multiplication sequences with missing starting digits:
- Missing first digit of
_ 12 18 24is 6 (counting by 6s) - Missing first digit of
_ 4 6 8is 2 (the sequence simplifies to 4 in the final input) - Missing first digit of
_ 6 9 12is 9 (derived from the third line) - Missing first digit of
_ 8 12 16is 8 (derived from the fourth line)
Entering the full sequence 6498 on the console activates the first shrink platform, teleporting your character into miniature testing zones.
| Stage | Puzzle Objective | Solution Code |
|---|---|---|
| Zone 1: Dollhouse | Inspect 4 items (Cat bed, TV, Box, Lamp) | 4821 |
| Zone 2: Mass Scale | Weigh beakers C, A, G, E, D from heaviest to fifth heaviest | CAGED |
| Zone 3: Lab Symbols | Match wall symbols (Beaker, DNA, Germ, Empty Beaker) | 2653 |
| Zone 4: Wordle & City | Solve 5-letter word, then read numbered Lego buildings 1–9 | Wordle: AHEAD / City: REACTIONS |
Zone 1: The Dollhouse
Climb the stairs inside the miniature house and locate the four designated inspection objects to read their assigned numbers:
- Cat bed: 4
- Television: 8
- Cardboard box upstairs: 2
- Desk lamp: 1
Punch 4821 into the console to power the first line, then return to the main lab.
Zone 2: The Beaker Scale
Place the lettered beakers onto the weight scale. Sorting the top five heaviest containers produces their letter tags in descending order:
- C (149 mass)
- A (107 mass)
- G (92 mass)
- E (80 mass)
- D (74.5 mass)
Type CAGED into the terminal. Step onto the platform to enter an enlarged domino room. Follow the power cable to a Simon Says color wheel. Press the flashing colors in sequence across five rounds to restore power.
Zone 3: Wall Symbol Decoders
The third terminal displays four science icons. Match each icon to the corresponding digits marked on the lab walls and floor:
- Filled beaker: 2
- DNA strand: 6
- Virus germ: 5
- Empty beaker: 3
Submit 2653 into the keypad. Teleport across to the card table and complete the pair-matching memory game by clearing all identical cards.
Zone 4: Wordle and Lego City
Examine the green Wordle display board. The confirmed letters form the word AHEAD. Input AHEAD into the station to open the path to the model city.
Walk past the miniature Lego buildings and read the letter stickers attached to buildings numbered 1 through 9 (ignoring building 10):
- Building 1: R
- Building 2: E
- Building 3: A
- Building 4: C
- Building 5: D
- Building 6: I
- Building 7: O
- Building 8: N
- Building 9: S
Type REACTIONS into the city console to send power back to the main laboratory.
Phase 3: Fume Hood Vent Alignment and Exit
Return to the lab floor. The Chemicals Closet and fume hood back panel will now slide open, exposing a wire network.
Interact with the puzzle segments to rotate and swap the broken wire paths into a continuous circuit:
- Reconnect Section 4 into Section 6
- Align Section 2 into Section 5
- Route Section 3 into Section 1
Once all lines connect, acid fumes vent outward, opening the chamber exit. Walk through the cleared escape route before the 90-minute sprinkler timer expires to earn the Experiment Complete! [BEGINNER] badge.
Frequently Asked Questions
What happens if the 90-minute timer runs out in Chapter 4?
When 90 minutes elapse, the lab activates the sprinkler system and sprays hydrochloric acid throughout the room, immediately ending the run and awarding the Experiment Failed... [BEGINNER] badge.
Do the puzzle codes randomize in Chapter 4 Beginner Mode?
Unlike Standard Mode—where potion racks, weights, and card codes shift every run—Beginner Mode uses fixed text solutions including MOCKING, 4591, 4821, CAGED, 2653, AHEAD, and REACTIONS.
How do you get the final domino out of the glass cylinder?
Collect the water bottles obtained from the crossword keypad, the dice station, the Sudoku grid, and the table near the weight scale. Pour all four bottles into the tall tube so the domino tile floats to the surface.
