Are a newcomer to transdimentional portalling?
Fear no more! it may require an MIT doctorate in theoretical physics in order to fight off alien invasions, but if you want to bend the very laws of space and time and mould them to your will though advanced portal technology, all you need is this handy little guide!
Or have you already rewired your brain in order to think with portals, but are unwilling to use your sense of hearing to find hidden radios scattered all over the Aperture Science Enrichment Center? Fear not, for this same guide will show you in detail where all the radios are, and where each of their hidden ARG transmissions are to be found!
Welcome to Half-Life Fallout - Gordon Freeman's source for everything on Half-Life and Valve.