LEGO Dimensions features new story content set in the Portal universe that takes place after the events of Portal 2.

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“ Our writers created it, although it's all been done with Valve's blessing. We don't make any pretense about what's canon and what's not.

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Speaking to IGN at Gamescom, WB Games producer Doug Heder explained that the story of LEGO Dimensions brings main characters Batman, Gandalf, and Wyldstyle through various worlds (from Doctor Who to Ghostbusters and beyond), including a stopover in Valve’s Portal universe.While that content ties into Dimensions’ main story and features test chambers with mechanics revolving around Batman, Gandalf, and Wyldstyle, a separate Portal Level Pack will also be available for purchase at launch. That expansion is designed specifically with Chell and her portal device in mind.“It's branded as Portal 2 Level Pack, and that's because we now have established that character in that world through the main game story, and now we pick up in the world where things have left off in that universe of Portal games,” Heder explained to IGN. “And, obviously Portal 2 being the most recent game to release, now things start to look a little bit more reflective of that state and where things kind of left off at the end of Portal 2.”“In addition to that adventure world, you also have a bespoke new Portal story level,” he continued. “This is another nine plus test chambers, and now these, instead of being sort of focused around the Batman, Gandalf, and Wyldstyle powers and abilities from the main game, now these are specifically built around Chell and her portal device. So, you're getting a real, true LEGO Portal experience in that world.”According to Heder, this story content was written by Traveler’s Tales and while it’s not necessarily canon, it’s all been done with Valve’s approval.Heder says he sees the new Portal content as “sort of an unofficial continuation” of the events of the Portal universe.“The story has a lot of fun poking holes in itself, and sort of being self-referential and all that. But, yeah, anybody who's a fan of the Portal games and have played it, they're going to recognize things there, and kind of go, ‘Hmm, what if this is where that story led?’”The Portal story content will feature multiple returning voice actors from the Portal series, including Ellen McLain as GLaDOS, Stephen Merchant as Wheatley, and Nolan North as various spheres and cores, plus “a few more surprises.”“This is just so much fun,” Heder said. “We've got, between the main game and the level pack, eighteen unique test chambers. I hate to say this, because this is not trying to say anything, [but] that is more test chambers than in a single Portal game. The skill for these test chambers is obviously a little bit different in comparison, but Valve has been a fantastic partner.""They've supported us all the way," he added regarding Valve. "They've been so excited to be a part of this project, and they've really opened up all the archives for us, and really been supportive on this. Working with their writers to kind of check and make sure the voices were all authentic-sounding, and everything really felt like it belonged in the universe.”The Portal 2 level pack will be available for purchase alongside LEGO Dimensions at launch and “you can dive right in without even playing the main game if you want,” according to Heder.LEGO Dimensions will be released on Xbox One, PlayStation 4, Wii U, Xbox 360 and PlayStation 3 on September 27. For more on its Portal content, read our hands-on impressions from E3 , plus look out for new impressions of additional levels from Gamescom very soon.For more from Germany, be sure to visit our Gamescom hub , and find out everything there is to know about LEGO Dimensions in our Lego Dimensions wiki

Andrew Goldfarb is IGN's executive editor of news and thinks the Chell LEGO figure is adorable. You can find him rambling about animals and Spelunky on Twitter