two of the more common ones are 'she is watching you' and 'the cake is a lie'. packed away behind 2 companion cubes and a faulty hydraulic panel you find a small den filled with tons of trash and even more unsettling.writing on the wall that seems to be written, in blood? though the site seems overall creepy at first glance, you soon read the messages and understand the meaning behind them. this one by far more creepy then all the previous.

These lines lead to you getting paranoid, and no amount of glitching and 'subject name here's' can make you think differently. on top of that she starts to mention the end of your test more and more often, accompanying vague and unsettling lines such as 'you will be missed'. the test become more and more dangerous, even coming to the point where they involve military grade turrets. I mean what are the odds it happened before? But then Right? its probably just a per-recorded message for when a test subject knocks over a camera. of course a machine cannot know what you are doing You go to put a portal behind a camera she reacts as if she knew, as if she was 'watching you'. Her voice occasionally glitches out, assuring you once again you are alone in this cold, florescent lit world. Welcomes you to the computer aided enrichment center', so of course you are not being guided by a person.right? Throughout the test chambers At the beginning of the game you would think she was just a voice recording, of course you are assured of this i mean, 'She

Unlike portal 2, where you knew glados was an ai from the beginning, in portal 1, she was a complete mystery up until the very end. not only did it blend seamlessly with the puzzles, but it gave you subtle hints into what kind of world you are trapped in. One thing portal had over portal 2 was the environment.

Portal and portal 2 comparison