Did you enjoy yesterday's three-minute gameplay clip of Portal 2? Fancy another two videos showing some brand new puzzle mechanics? Oh, go on then.

Dom O'Leary is a contirbutor on Game Rant. He has over 6 years of experience in writing, covering everything from games news and reviews to commercial writing and editing. He's been a lover of games ...

Apart from a quick teaser trailer at E3, we've yet to see anything meaty of Portal 2. What's happened to the research base? Are there any new characters? Is GLaDOS "still alive"? This three-minute ...