Flash version of Valve’s popular expansion pack for Half-Life 2, Portal. Use the ‘W’, ‘A’ and ‘D’ keys to control the character on screen, and click the left mouse button to create ‘portals’ in order to navigate your way around the 2D environment. Gets progressively harder; the 3D version is better.
Flash file: _flashnode (Flash is no longer supported by browsers; kept for the record)
Source: http://portal.wecreatestuff.com/
