Portal 2: Peer Review Videos

Check out the final test in Portal 2's free DLC.

Things get tricky in section eight of Art Therapy. See how we passed the test in this gameplay movie from the free Portal 2 DLC.

As Occam's razor says, "The simplest answer to a scientific problem is to just fling white paint over every surface." I'm fairly sure that's how it goes.

In this gameplay movie we use the three pillars of scientific thinking to solve a puzzle. No, not reason, logic. and critical thinking--jumping, lasers, and portals!

If at first you don't succeed...

Don't you just love that bouncy blue gel? Wish I could paint my room with that.

The Portal 2 co-op DLC has landed! Take a look at the first scientific test in this gameplay movie.

Check out the second test in the free Portal 2 DLC in this gameplay movie.

Take a look at the third test from the new Portal 3 DLC. Features jumping, block catching, and, you guessed it, portals.