GameSpot may get a commission from retail offers. In the Portal games, the rogue AI GLaDOS gets her kicks by putting players through a series of deviously designed test chambers. Valve is giving ...

Didn't you find Portal 2 maps challenging enough? Well now you can make your own - Valve has released beta Authoring Tools for Portal 2. As well as single-player and co-op maps, you can use the tools ...

If you are a Portal 2 fan, you might be pleased to know that Valve has just released a set of Portal 2 Authoring Tools in a Beta release. This is a version of the ...

Finished Portal 2 but haven't had your fill of Aperture Science testing chambers? Aside from handing out a slew of free content in the coming months, Valve is releasing the Portal 2 Authoring Tools -- ...

Sure, we already think Portal 2 is a wonderful educational tool, but Valve wants to convince everyone else of that fact. And not by evangelizing the title to college-aged people the world over, but ...

The Portal 2 Puzzle Maker offers a simple and intuitive editor to create new single player and co-op test chambers that is also compatible with more complex tools like the Portal 2 Authoring Tools or ...

Valve's released the Authoring Tools kit for Valve 2, enabling you to make your own levels for the game. The tools included in the kit allow you to create any type of mod for the game: single-player ...

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If you fancy making your own maps, models, skins, or other exciting new things for Portal 2, you can now get cracking as Valve has released a beta version of the first-person puzzler's PC mod tools.

Valve has made the beta Portal 2 Authoring Tools available for free for owners of the PC version of the game. Downloadable through the Tools section of Steam, Valve has said that the kit will include ...