Half-Life 2's critics groan about its linearity, and its fans groan about how long it is between episodes. But the series shrugs off both complaints when you start seeing it for what it is: a series of playable movies. Better than anyone, Valve make cinema that you're a part of - and they do it at about the same rate Warner Bros churn out new Harry Potter films.
We know some gamers love a sandbox but it always baffles us when that love seems to preclude the enjoyment of anything else. Do these people storm out of cinemas when they realise their popcorn munching isn't controlling the actors? Are there really people who can't enjoy a gorgeous, hurtling ride like this? We cannot wait for Episode three.