A new Portal map pack was just released from We Create Stuff. This map pack are actual Portal maps based off of the flash version of Portal, a 2D title that features 40 levels.
The pack places you in the role of a new test subject before the events of Portal. You can download the pack directly from this link, or visit the map pack page for a list of mirrors.
The pack places you in the role of a new test subject before the events of Portal. You can download the pack directly from this link, or visit the map pack page for a list of mirrors.