Portal Walkthru - Chapter 5 and 6

We've got a few tough tests ahead of us. You'll need to move a cube from the start to the end of the level and press two buttons to finish the area. After that, you have to deal with a toxic pit and a long corridor. If you need some help with chapter 5 and chapter six (testchamber 13 and testchamber 14), then just look here at this part of the bigger Portal Walkthru.