@SupaPhly part of the reason could be that they are more responsive to FOREX fluctuations than MS or Valve. The other reason is that we are so small for Sony that they can't be bothered to match what happens on the other platforms.
If you have both consoles it allows you to price shop, i've picked up a few games this way.
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Witchfinder Vol. 04: City Of The Dead (TP)
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Flesheating corpses and an ancient temple discovered beneath London lead authorities to call upon Edward Grey, Queen Victoria's official occult investigator. But the sinister Heliopic Brotherhood of Ra also has interests in the underground ruins. When they ask for Grey's help, he has to wonder if the threat is great enough to team up with a secret society he's sworn to destroy. Collects Witchfinder: City of the Dead #1-#5.