Take a sneak look at the upcoming DLC for Portal 2. Valve has sent out a five minute video to showcase the upcoming free DLC for Portal 2. Titled Perpetual Testing Initiative, the DLC offers a ...

After debuting all the way back in April 2011, not to mention racking up Game of the Year awards around the industry, Valve recently gave players a reason to return to their testing chamber for more ...

Lego has been doing some impressive work with crossovers in the past several years, notably with its lines of Star Wars and Minecraft themed sets. Now, a pair of amateur Lego designers is seeking ...

Were this high school, the idea of a "Perpetual Testing Initiative" would not be met with open arms--even if it were free. However, when Valve announces said program for Portal 2, people get excited.

"You should sit down," the Portal 2 blog recommends, because there's big news in the world of science. Valve has added co-op to the Perpetual Testing Initiative – the company's fancy name for the hit ...

Valve's first-person puzzler Portal 2 has received a significant update today. For months, players on PC and Mac have been able to create their own puzzles through the "Perpetual Testing Initiative." ...

All the Latest Game Footage and Images from Portal: Forever Testing Portal: Forever Testing Is a Fan-created Modification for Valve Software’s Portal 2, containing various custom-built levels for the ...

There are a lot of new puzzle mechanics that are added in Portal 2 that up the ante in terms of how complex the series’ puzzles can be. Hard Light Bridges are introduced in the early hours of the game ...