Green Hill Studios CompanyOverviewGames Navigation: Home / Companies / Green Hill Studios Overview Avg. Game Rating 5.33/10 Green Hill Studios Games Knytt Underground PS3 Ripstone / Green Hill Studios 18th Dec 2012 (NA)21st Dec 2012 (UK/EU) Gun Commando PS Mobile Ripstone / Green Hill Studios 23rd Jan 2013 (UK/EU)23rd Jan 2013 (NA) Knytt Underground PS Vita Ripstone / Green Hill Studios 18th Dec 2012 (NA) Share: