There are many levels and tests of Aperture Science. But this one... It's not just built to test... It's built to test YOU. Use your puzzle solving skills to solve each chamber, if you're up to the task! Welcome to The Complex. Difficulty: Easy AUTHOR'S NO...

With each ascent into the new level, they may or may not get harder. Who knows? DIFFICULTY: Easy/Medium, depending if you know what to do....

Reunited with a faithful... companion. The tests seem to be getting more advanced... Difficulty: Medium...

The chambers keep getting trickier. Time to see what you can do! Difficulty: Medium AUTHOR'S NOTE: If you've completed Aperture Tag, some chambers shouldn't be that difficult. If you haven't, well... Just keep trying until you get it right. For SCIENCE!...

So, the tests got harder? But that won't stop you! You're determined to get through The Complex! Difficulty: Medium/Hard, depending if you know how to do certain things....

Wait, what's this? These tests aren't so hard... Strange. But you progress on to get through. Difficulty: Easy/Medium...

Ladies and gentlemen, I have returned with the 7th part of The Complex! I know, I haven't done anything much, because I've been focusing on other things, but I've had this in development for a while. I hope you all enjoy! Difficulty: Easy/Medium...