Use 2451 for the lab cabinet, press LLRRLR at the direction box, make oil before acid, then brew 1 egg + 1 juice + 1 acid + 1 oil + 3 blood. For Animal Testing, put a drop of the finished elixir in the parrot's water bowl before giving the bottle to Aldous. The official walkthrough specifies one juice; one third-party guide reports four, so that disagreement remains noted below.
Translate the alchemy room before you mix
The lab is one connected chain: the board tells you what the room symbols mean, the apparatus creates the missing liquids, and the recipe book is the final check.
| Clue in the room | Meaning | Why it matters |
|---|---|---|
| River painting | Water | Use it for the parrot bowl and flower pot. |
| Two-finger hand | 2 | Place the number on the symbol board. |
| Soldier | 3 + Left | Count three steps and read the direction. |
| Floor box | LLRRLR | Press the known Left/Right sequence for matches. |
| Lit candle | Heat | Light it after opening the direction box. |
| Aldous's pocket note | Aldous | Match the character symbol on the board. |
| Sibling portrait | Middle | Use the remaining family clue. |
| Parrot bowl | 5 | Five water drops reveal the number clue. |
| House windows | 4 | Use the five-plus-windows calculation. |
Fill a clean flask before moving to the acid combination.
Fill another flask and add the new symbol to the board.
Use an empty flask under the grinder and pull until it fills.
Water the flower, collect the fruit, then put it through the grinder.
Test one drop on the parrot first if you want Animal Testing, then give the completed elixir to Aldous.
What to do
- 01Translate the room before mixing.
Use the river for Water, the two-finger hand for 2, the soldier's three left steps for 3 and Left, the lit candle for Heat, Aldous's pocket note for Aldous, and the sibling portrait for Middle. Feed the parrot five drops of water to identify 5; the house-window clue supplies 4.
- 02Open the lab cabinet.
Enter 2451 at the cabinet beneath the board and take the empty flasks. Keep one flask available for each new liquid so you do not overwrite a symbol before the board is complete.
- 03Solve the direction box.
Use the known Left symbol to press Left, Left, Right, Right, Left, Right (LLRRLR), then take the matches and light the candle. The newly revealed Right and Heat symbols complete the next board clues.
- 04Make oil before acid.
At the three-flask apparatus, press the left pump twice and the middle pump three times, then fill a flask with oil. Next press the right pump four times and the left pump once, then fill another flask with acid. Record both symbols on the wall board.
- 05Turn the remaining materials into blood and juice.
Pour acid into Aldous's glass, take the meat, and put it into the grinder with an empty flask underneath. The official walkthrough says to pull the lever four times. Add four drops of water and one drop of blood to the flower pot, collect the fruit, then grind it with four lever pulls to make juice. These four pulls prepare the ingredient; they are separate from the recipe quantity.
- 06Brew the elixir and test it.
The official recipe is one egg, one juice, one acid, one oil, then three blood. Put a drop of the finished elixir in the parrot's water bowl first for Animal Testing. Then pour it into Aldous's glass; if he asks for the bottle, give it to him to finish the task.
Common questions
What is the Servant of the Lake alchemy recipe?
The official recipe is one egg, one juice, one acid, one oil, and three blood, in that order. One third-party guide reports four drops of juice instead; a current-build replay is still pending. Put a drop of the finished elixir in the parrot's water bowl before Aldous for Animal Testing.