Publisher THQ is promoting Metro: Last Light by throwing free redeemable Steam codes for Metro 2033 at us. All you do is sign into Facebook and give them the thumbs up with a Like.

There's an additional step though; you need to download and run a file from THQ. We're told to follow the on-screen instructions to earn our redeemable key. What cheek.

Metro 2033 was an "unpolished gem" for THQ which they "came to realise a little too late," but despite this it went on to sell over a million copies on PC alone. It's moved from "cult-hit" to "bonafide hit."

Now the developer is working on sequel Metro: Last Light, which continues Artyon's journey. Metro author Dmitry Glukhovsky had to provide a "completely new story and plotline" for the game.

THQ's Core Games VP Danny Bilson says that 3D is not a good fit for every game, and THQ doesn't plan to add 3D support to every game it releases, only for those that'll play well with it.

"My personal opinion is that 3D is a really cool feature for some things. I don't see the whole world going 3D on everything," said Bilson in an interview with Industry Gamers.