Life in the shadows has never been as dangerous, and runners need every edge they can get. Runner's Companion opens up a world of expanded options for Shadowrun players with dozens of New Qualities, Advanced Contact and Lifestyle Rules, and handy tips on running, travelling and smuggling, and operating in a surveillance society.This core book for Shadowrun, Fourth Edition also introduces Metavariants, Changelings, and the Infected as player character options, and expands the scope of the game to include unique non-metahuman characters such as Shapeshifters, Free Spirits, and a new generation of AIs among others.