▁GmbH , ▁a ▁Rain bow ▁Arts ▁( So ft g old ) ▁label . ▁Stock ▁continued ▁to ▁work ▁with ▁So ft g old / R ush ware , ▁first ▁as ▁a ▁fre el ancer , ▁later ▁in ▁a ▁permanent ▁role ▁as ▁a ▁programmer ▁and ▁producer ▁at ▁Rain bow ▁Arts . ▁He ▁also ▁developed ▁his ▁own ▁project , ▁Mad ▁TV , ▁at ▁Rain bow ▁Arts ; ▁lay ing ▁the ▁found ations ▁for ▁its ▁indirect ▁success ors . ▁After ▁working ▁as ▁a ▁producer ▁and ▁game ▁designer ▁at ▁Rain bow ▁Arts , ▁Ralph ▁Stock ▁became ▁the ▁chief ▁producer ▁and ▁head ▁of ▁development ▁in ▁ 1 9 9 0 . ▁ ▁For ▁Stock , ▁like ▁many ▁other ▁game ▁developers ▁in ▁the ▁post - Am iga ▁era , ▁Rain bow ▁Arts ▁was ▁a ▁place ▁to ▁test ▁his ▁ideas ▁before ▁found ing ▁his ▁own ▁company . ▁By ▁his ▁own ▁statement , ▁developing ▁the ▁German - language ▁versions ▁of ▁computer ▁games ▁by ▁Lucas film ▁Games , ▁T SR , ▁and ▁S SI , ▁and ▁interact ing ▁with ▁game ▁design ers ▁from ▁around ▁the ▁world , ▁like ▁Chris ▁Roberts ▁and ▁Richard ▁Gar ri ott , ▁was ▁p iv otal ▁in ▁Stock ' s ▁career ▁as ▁a ▁game ▁designer ▁and ▁producer . ▁ ▁Prom otion ▁Software ▁and ▁Six teen ▁T ons ▁Entertainment ▁( 1 9 9 3 – present ) ▁ ▁In ▁ 1 9 9 3 , ▁Ralph ▁Stock ▁founded ▁the ▁company ▁Prom otion ▁Software ▁GmbH ▁in ▁T üb ingen , ▁Germany . ▁With ▁his ▁company ▁he ▁developed ▁prom ot ional