Cam steps up to pass judgement on the ultimate Portal Test Chamber (of the week). Jane takes us on a journey to the great outdoors, while Seb tackles a turret regiment guarding a castle. Plus, we pay a visit to everyone's favourite doughnut aficionado, Homer Simpson.
Download this week's tests from the Steam Workshop:
Have you made your own test chambers? Seen any you think should be featured? Let us know in the comments below, or tweet us @gamespotuk!