Play testing and the process of gathering actionable feedback on game levels can be a tricky thing. Everyone plays games differently, and I’m sure we all know that guy / girl who gets stuck on the most basic puzzle sequence in a level. As level designers we try and limit these progress blockers as much as possible with clear and understandable designs but inevitably some will slip through. But wait, there is hope! A group of individuals exist whose purpose is to test, test, test until these wrinkles are no more. GladOS would be proud of the men and women of the Beta Testers Collective.