Shining Force > Thunder Force > Jet Force Gemini > Broforce > Earth Defense Force > Dustforce > Dragon Force > Maximum Force > Fighting Force > Brute Force
You do realize that GameSpot's January 2014 Game of The Month was OlliOlli? That's one of the hardest games on PlayStation Vita, or on any system, for that matter.
Difficult games score high all the time on GameSpot (Super Meat Boy 9.5, Dark Souls 9.5), so long as their difficulty comes from user error, and not from unfair game mechanics or cheap level design.
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