Portal 2 draws from the award-winning formula of innovative gameplay, story, and music that earned the original Portal over 70 industry accolades and created a cult following. The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers. Players will explore never-before-seen areas of the Aperture Science Labs and be reunited with GLaDOS, the occasionally murderous computer companion who guided them through the original game. More Info Developer: Valve Corporation Publisher: Valve Corporation Genre: Logic (Puzzle), 3D, 1st Person Language: EN / Multi Treatment: Not required Release Date: 2011 System Requirements CPU: 3.0 GHz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher) RAM: 2 GB OS: Windows 7 / Vista / XP Video Card: Video card must be 128 MB or more and with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher). Free Disk Space: 8 GB