Atomic Gamer - You've heard of Portal, right? One of the most brilliant games to come around in the last decade? Of course you have. What a lot of people don't know is that Portal was the brainchild of a young game designer called Kim Swift, who was recruited right from the DigiPen institute of game development to make Portal after her little team completed a mostly-unknown game called Narbacular Drop (which had several gameplay devices we wound up seeing in Portal). But what I'm a little unclear on is what caused Kim to leave Valve to join nearby developer Airtight games, made up primarily of ex-FASA (Crimson Skies) developers.