User blog comment:PlantyThePottedPlant/Random Topic Blogging II: Electric Blogaloo/@comment-1821137-20120309190135

So, on my second run of Portal 2, I completed the game in one sit in 4:25 hours. Wanted to do it under 4h, but oh well :P Additionally, some Portal 2 makers took 7 hours to finish their second run, even if they know all the solutions. They say it's impossible to complete the game in around four hours. Well, I proved them wrong.