Date added: September 11 2011
Description: Based on Valve's hit game. Includes over 40 challenging levels that include almost every feature from the 3D version: energy balls, turrets, cubes, and the crusher!!!
Instructions: A,W,D to move, Left mouse button to open a portal, Q launch blue portal, E launch yellow portal, R close both portals, F pick up an object, Esc/P to pause, ~ to open the console, 0 to adjust quality.