Digital distribution’s a funny bugger – it’s growing ever harder to predict and apply patterns to it. One day, a new videogame from Steam et al is more expensive than its boxed-copy counter-part, then a few weeks later it can be selling for next-to-nothing. The Steam Christmas sale is almost unreal in both the amount and extent of its discounts, and it’s going to be having Valve’s competitors howling with despair. Honestly: some of these deals are yer-actual-genuine-proper-mental. Today only: Mirror’s Edge is £3.24, GTA IV is £5. In general over the seasonal shakedown: Braid is £1.74, Medieval II: Total War is £2.50, Ghostbusters is £5, Batman’s £20… And dozens and dozens more. Of course, there are sales on at the other major download services too..