As soon as I saw the long line of quizzes trailing off the bottom of the browser, I instantly thought of this, hosted on their 'official' website
. Complete with Xmas-themed vault feed!
Okay, I will start you off. Your goal is to successfully submit the Aperture Science Test Subject Application Form. When you first load the page, you will be greeted with a command prompt, from the days of yore. Type 'LOGIN' and, when asked for the username and password, enter the following:
From here, you're on your own. Make what you will of it
It's more of a canon website for nerds like me to fawn over, but heck, it's got a quiz and if you've got the right sense of humour then it'll make you giggle.