That’s not all he’s left behind, either - in two locations in the hidden Rat Man Dens are secret transmissions. “Rat Man” has a story that intertwines with that of Portal and Portal 2 protagonist Chell, which can be found in Valve’s comic “Lab Rat,” and he also has left drawings all over his hidden rooms. He didn’t have the benefit of our Portal 2 FAQ, but he seems to have done okay. Hidden within the depths of Aperture Laboratories are the secret dwellings of Doug Rattmann, the last surviving Aperture Science researcher and an escaped test subject of the homicidal AI construct GLaDOS. Want more Portal 2 cheats, secrets, and collectibles? Download the Game Front walkthrough app for free and enjoy daily video guides, and extras. Posted on April 21, 2011, Phil Hornshaw Portal 2 Rat Man Transmissions
