Portal Alive Kicking Alive Kicking secrets and easter eggs

Portal has always been wider than its test chambers. Doug Rattman — the Rat Man — left evidence of his presence across Aperture before Chell arrived. Hidden rooms, scrawled messages, and a radio with a red LED are the texture that turns a puzzle box into a place. This page documents what the original game hid and what Alive & Kicking carries forward in its Portal 2 rebuild.

Spoiler territory. Everything here is past Chamber 05.

Rat Man dens

Doug Rattman was a test subject who escaped GLaDOS’s earlier experiments and spent the rest of the game living in the walls of Aperture Science. He left behind dens — hidden rooms with scrawled messages, food wrappers, and evidence of survival. The dens are not required to finish the game, but they are why the Enrichment Center feels lived-in.

Original Portal hid six Rat Man dens. Until the community confirms which ones survive in the 2026 remake, the locations below follow the original layout:

Den 1 — Chamber 03 pit area. Behind the pit, accessible with a precise portal shot. Rattman camped here to watch test subjects fall. Contains a cryptic message about observation.

Den 2 — Chamber 05 fizzler corridor. After the emancipation grill, before the exit. A sleeping bag, food cans, and a note questioning the cake’s purpose.

Den 3 — Chamber 07. Behind the raised platform area. Rattman drew a map of Aperture on the wall. The map is inaccurate by design — he was paranoid and writing fast.

Den 4 — Chamber 08. Above the pit chamber, accessible from the pit floor with a well-placed portal. A radio with a red LED, food wrappers, and the message: She is going to kill me.

Den 5 — Chamber 09. Behind the moving platform track. Rattman left a photograph of a dog. The caption reads: Dogs are good.

Den 6 — Chamber 17. Behind the pellet catcher area. The densest den: multiple notes, a survival setup, and a final message about waiting for the rocket to fire.

The walkthrough does not route through these. They require curiosity and a willingness to look at walls instead of buttons.

Hidden messages

Scrawled text appears on walls throughout Aperture. Rattman was not the only voice — previous test subjects left notes too. Common hidden messages:

• The cake is a lie. Found in Chamber 03 and again near the escape. GLaDOS promised cake; test subjects learned not to expect it.
• You are being watched. Chamber 05 and Chamber 09 corridors. Rattman’s paranoia in print.
• There is no bottom. Chamber 08 pit area. Either a warning or a taunt, depending on your relationship with the fizzler.
• Don’t listen to her. Chamber 12 area. A previous test subject’s note to the next one.

Alive & Kicking uses Portal 2’s panel and wall language. The messages appear where the original put them; the surfaces look different, the ink is harder to miss.

The radio in Chamber 08

The most famous secret in the original Portal: a working radio in the Rat Man den above Chamber 08, tuned to an 8-hour loop. The loop has ended by the time most players find it. Alive & Kicking’s Chamber 08 in the remake is the same sightline room it always was; the den above it is the same hidden space.

If the remake’s Portal 2 engine allows the radio to play a longer or different loop, the community has not published a confirmed answer. Check community posts after a first clear.

What the remake adds

The store page for Alive & Kicking mentioned retcons and extra details the original could not carry. Portal 2’s engine allows:

• More detailed Rat Man den environments. The sleeping bag, food cans, and messages are in the same locations but with better asset fidelity.
• A reactive score that changes the mood of hidden spaces. A den that felt claustrophobic in 2007 sounds different when the score is live.
• The escape halls are rebuilt. The space behind the observation room may contain new texture detail that was not possible in the original Source branch.

The developers have not published a list of what exactly was added versus preserved. Until the community datamines the 2026 build, treat every den as potentially deeper than before.

Finding secrets without a guide

The chambers that hide the most:

• Chamber 03 pit. Look up before you leave.
• Chamber 08 pit floor. Look up before you solve the room.
• Chamber 09 platform track. Look behind moving infrastructure.
• Chamber 17 pellet catcher. Look past the catcher.

A portal gun makes reaching hidden walls easier than the original allowed. Blue on the pit floor, orange on the den wall above — that is the basic geometry for three of the six dens.

Secrets and achievements

Original Portal hid radios that fed into the Transmission Received achievement. Alive & Kicking lists nine Steam achievements, not the original’s fifteen. If a secret in this remake is achievement-gated, the community has not confirmed it yet. Use the achievements page to track what the overlay shows, and check community posts if a grey box stays grey after a legal clear.

The differences from Portal page covers what the remake keeps and what it changes. This page covers what survived in the walls.