ing ement ▁in ▁the ▁Washington ▁Western ▁District ▁Court ▁in ▁Seattle , ▁Washington . ▁Am iga , ▁Inc . ▁su ed ▁Hyper ion ▁for ▁bre ach ▁of ▁contract , ▁tra dem ark ▁viol ation ▁and ▁copy right ▁in fr ing ement ▁concerning ▁the ▁development ▁and ▁market ing ▁of ▁Am iga OS ▁ 4 . 0 , ▁stating ▁that ▁Hyper ion ▁had ▁continued ▁to ▁develop ▁and ▁market ▁Am iga OS ▁ 4 ▁without ▁pay ing ▁agreed ▁roy alt ies ▁and ▁had ▁continued ▁to ▁do ▁so ▁even ▁after ▁being ▁war ned ▁to ▁ce ase ▁and ▁des ist . ▁ ▁Hyper ion ▁launched ▁a ▁counter ▁action , ▁claim ing ▁fra ud ▁in ▁the ▁Am iga , ▁Inc . ▁handling ▁of ▁Am iga ▁intellectual ▁properties ▁and ▁deb ts , ▁including ▁the ▁use ▁of ▁deb t - hold ing ▁shell ▁companies , ▁by ▁sh ifting ▁responsibility ▁between ▁these ▁shell ▁companies . ▁They ▁also ▁claimed ▁that ▁Am iga , ▁Inc . ▁had ▁failed ▁to ▁u ph old ▁their ▁part ▁of ▁the ▁contract ▁and ▁had ▁been ▁un tr uth ful ▁in ▁correspond ence ; ▁and ▁that ▁they ▁had ▁failed ▁to ▁deliver ▁the ▁Am iga OS ▁ 3 . 1 ▁source ▁that ▁Am iga OS ▁ 4 ▁was ▁developed ▁from , ▁forcing ▁Hyper ion ▁to ▁find ▁it ▁elsewhere . ▁In ▁spite ▁of ▁that ▁on going ▁legal ▁dispute , ▁in ▁aut umn ▁ 2 0 0 7 , ▁Hyper ion ▁released ▁a ▁stand alone ▁version ▁of ▁Am iga OS ▁ 4 ▁for ▁classic ▁Am iga , ▁an ▁action ▁Am iga , ▁Inc .