Everyone loves Portal. It is, for all intents and purposes, a perfect game. Though it is very short. However, thanks to Valve being the definition of a user-focused developer, an official Portal level-editing kit was bundled onto the web some time ago, and now there's a whole collection of user-made levels to enjoy.
But where do you start? Well, Games Radar discovered a 35-map pack (plus an extra map ) and hooked it up to FileRadar, then they picked out the best five maps from the collection.