True Lab

Undertale guide · The player discovers the secret facility beneath the lab

The True Lab is a dark, underground research facility accessible via the elevator in Alphys' Lab on a True Pacifist run. You must navigate the creepy corridors, examine log entries detailing Alphys' experiments with determination and the Amalgamates, and collect four colored keys to activate the central power generator. Restoring power unlocks the main elevator, allowing you to return to New Home for the final sequence.

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Bad Memory: Dropped during the Memoryhead fight if you use the Item action

Items

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Red Key: Dropped into your key chain automatically after defeating Memoryhead in the sink roomGreen Key: Retrieved from the bathtub in the showers after interacting with the shower curtainBlue Key: Found in the north room, received after interacting with the refrigerators and defeating Snowdrake's MotherYellow Key: Discovered hidden under a bed in the dormitory areaPotato Chips: Purchased from the vending machine in the hallway for 25G

Secrets

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You can lie down in one of the beds in the dormitory, after which a strange ghostly figure will tuck you in and pat your head.

Enemies

Memoryhead

Encountered by inspecting the sink in the sink room; spared by using Cell then Refuse.

Endogeny

Found in the fan room disguised as an exclamation point; spared by treating it like a dog using Beckon, Pet, Play, Pet, Pet.

Reaper Bird

Disguised as a misplaced SAVE point in the mirror room; spared by using Pray, Mystify, and Clean.

Lemon Bread

Disguised as a save point in the northern corridor; spared by using Hum, Flex, and Unhug.

Snowdrake's Mother

Found in the refrigerator room; spared by telling three Jokes or laughing.

Amalgamate

An overarching category of enemies created from fallen monsters fused with determination; cannot be killed.

Tips

Do not worry about keeping your HP high outside of battle, as sleeping in any of the dormitory beds fully restores your HP.
Amalgamates cannot be spared by standard attacks and take practically zero damage; you must figure out the specific Act combinations to satisfy them.
Be cautious when approaching SAVE points in this area, as two of them are actually Amalgamates lying in ambush.

Not listed for this area: shops and people.

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