@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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Sniper Elite 4
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Set in the aftermath of its award-winning predecessor, Sniper Elite 4 is a third person stealth / shooter that continues the series' World War Two heritage by transporting players across the beautiful Italian peninsula, from sun-drenched Mediterranean coastal towns, to colossal Nazi mega structures, daunting forests and giddying mountain monasteries inspired by Monte Cassino.