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I know that there were no other test subjects alive in Portal 2 (excluding the ones in the co-op), but were there other test subjects alive in Portal? You never see them or anything that would suggest their (living) presence in the facility. I would imagine that GLaDOS had other test subjects since GLaDOS had planned to kill you. But is there any proof of other test subjects?

I am not referring to the ones found in co-op in the 1950s cryogenic freezing. I am asking if there are any alive in the more recent Aperture Science testing course excluding the ones from co-op. (directly after GLaDOS had been activated)

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huh? I thought there were other living test subjects in Portal 2, but they're just frozen. – BlueRaja - Danny Pflughoeft Nov 7 '11 at 8:25
@BlueRaja LAB RAT suggests that life support in every other stasis chamber was shut down - which explains Wheatley ranting about it when you first meet him. – doppelgreener Nov 8 '11 at 0:16

There is no proof that GLaDOS had other living test subjects during Portal's timeframe. In fact, the comic that bridges the two games (Lab Rat) seems to specifically indicate that there weren't any humans alive in the facility except Chell and Doug Rattmann (Rattmann is not/never was a test subject).

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I believe this is the link to the comics, for those who are interested – Rapida Nov 7 '11 at 5:02
I don't think this is true because Rattmann sets Chell to the top of the testing list so that GLaDOS would test her first and would defeat GLaDOS before too many of the other test subjects died. – m.n.wiser Nov 11 '11 at 1:47
Chell is in suspended animation in the relaxation vault between that moment and the start of Portal; she was no longer with the other test subjects that were still in storage. I suppose it's possible the other subjects were alive, but my answer still stands in regards to your original question; " there any PROOF of other [living] test subjects?": no. – Nacimota Nov 14 '11 at 16:56

In the original Portal there was a clipboard with a humanoid figure on it (probably representing Chell) and another clipboard with a chicken-like figure on it. It is not clear if this represents a normal chicken or some sort of mutant chicken. However the clipboard implies that this chicken is yet another test subject, albeit not a human test subject.

The Portal Game Wiki mentions this clipboard:

Here is a screenshot of the Chicken subject's clipboard: The clipboard of the failed Chicken test subject in Portal

Here is a screenshot of the Human subject's clipboard: The clipboard of the successful Human test subject in Portal

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can you add a screenshot of this? – Zommuter Jan 28 '12 at 21:43
Sure I'll fire up Portal tonight and see if I can find it. I seem to remember it being towards the end of the game, after Chell goes behind the facade of the Test Chambers. – voidstar69 Jan 30 '12 at 14:29
I've posted the screenshots above. This proves that there was at least one other test subject alive in Portal, albeit not human. – voidstar69 Jan 31 '12 at 12:27
thanks, I wonder: could this also be a Vortigaunt? – Zommuter Jan 31 '12 at 12:59

There must be hundreds of test subjects during Portal's timeframe because they are present in Portal 2 co-op. I don't think they could have gotten in the AS Vault after the events of Portal.

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I think that Wheatley says that they all died during the initial events of Portal 2 – Joe the Person Nov 8 '11 at 0:58
Wheatley didn't know about test subjects in the Vault I guess. Anyway, we unlock them in coop which happens after the events of singleplayer campaign. – Air Nov 9 '11 at 16:01

In Portal Stories, A test subject named Mel and another core defeat a security system (not GLaDOS) that was

trying to kill GLaDOS.

When they defeat it the computer says there were three intelligents in the lab - one of them was GLaDOS. Mel and the Core gave Her a spotting chance to recover. And that was what woke up Chell.

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There were other test subjects alive but most if not all died between the events of portal and portal 2. This is because they were other test subjects in the relaxation vault but died after being in suspended animation for too long which is stated by Wheatly. Also, Chell's name was put at the top of the testing list so that she was tested first so it's likely that none of the suspended test subjects were active during portal.

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