[I do not own the video above]

Everyone who played it loved portal, and everyone who played it would almost definitely love an anime, or a movie. Also, this benefits valve as they could probably make a good deal of money for it. Portal was one of the best video games to be made and is extremely creative. The community of portal players would come back to life if they created a form of media based off of portal. I, for example, have many questions beyond the conclusion of the game. It's not just "what happened to wheatley after he got escorted to space?". How about, "Who were Chell's real parents?" Or "why was the ratman so keen on Chell?" (I know that was explained in labrat but they could still put it in the anime.) The whole audience of portal loved some part of the game, no doubt about it. I feel like this anime would also make it much easier to get people into the game when you show them it, which would then lead to more money for valve.

Unfortunately, this isn't something huge that the company will take in and immediately try to take action. However, it is very highly requested not just by the average person, but by YouTubers. There are base introduction songs on YouTube and people are proving the points on vlogs about their requests. I hope that valve realises how much this would mean to all its viewers.