On our forums, I met a couple of guys that are plain crazy and defy each others to see which one of them will manage to beat the challenges of Portal: Prelude in the least time, steps and portals. These guys are so skilled at Portal that most people can't even understand what they're doing on these videos!
Check this out:
This is why I decided to build them their own little official ladder, where everyone can see who made the best score and how. On this new page, you will find the best scores for each challenge of Portal: Prelude without exploiting bugs. Now, if you think you can beat one of those scores, we urge you to record yourself, to upload the video somewhere and to send us the following informations via our forum or to email@example.com.
In case of draw, the upload date will act as an extra proof (the older, the better).
A last one to conclude this post, it never gets old: