First Metro 2033 was part of the THQ Indie Bundle, allowing you to pick up the game for a ridiculously cheap price. Now it appears as though THQ is literally giving the game away for free.
Normally such 'freebies' are tied up in irritating forms you need to fill in, or offers you have sign up for, but getting access to a free copy of Metro 2033 is remarkably simple, and relatively unobtrusive. You simply have to 'like' the official Metro page on Facebook, follow a few prompts and 'bam', you'll receive a Steam code for Metro 2033. Pretty incredible.
The deal starts from today and runs until the 17th and is clearly a way to get people interested in the game's sequel which is set for release in March 2013. What better way to get people interested that to give away its predecessor for zilcho?