For those of you wondering why the fantastic 'Half-Life' saga hasn't concluded then look no further than 'Portal'. The surprise hit diverted all attention into a sequel to the near-perfect 2007 hit.
'Portal 2' follows on many years after the original where again the player has to escape the Aperture Science Enrichment Centre with the aid of an affable robot accomplice called Wheatly (voiced by Stephen Merchant) using the portal gun to create opening and exit portals in ever more complicated puzzle rooms. That's all the plot I'm going to give away but I will say that in every respect the scope of 'Portal 2' has been increased with the introduction of more characters, greater exploration and even more insights into the history and mythology of the 'Portal' universe (which is linked to the Half-Life universe). There are also additions to the puzzle mechanics with different gels to enable the player to jump higher run faster and create portals on previously impossible surfaces. Another innovation is with multiplayer, now two players can assume control of 'Test Robots'and play through a series of specialised cooperative multiplayer puzzles which extends the gameplay by a good number of hours.
There are twists and turns along the way and as with the previous game it is highly advisable to wait until the final credits have rolled. I really can't think of a great problem with the game. It had huge ambition and a weight of expectation upon it and in my opinion it succeeded. It can never be the quaint and I'm assuming success of the first game and some people might find all the extra bells and whistles to be a bit egregious but it's now my go to game of choice for imaginative and humorous puzzles.