▁ear ning ▁a ▁ 6 ▁figure ▁income ▁off ▁the ▁back ▁of ▁roy alt ies ▁for ▁games ▁which ▁Sierra ▁were ▁market ing ▁for ▁him . ▁As ▁time ▁went ▁on , ▁John ' s ▁increasing ly ▁worry ing ▁relationship ▁with ▁Sierra ▁began ▁to ▁get ▁worse , ▁the ▁cutting ▁of ▁roy alt ies ▁and ▁the ▁lack ▁of ▁recognition ▁for ▁his ▁work ▁soon ▁became ▁a ▁catal yst ▁which ▁led ▁to ▁him ▁leaving ▁the ▁company ▁to ▁work ▁at ▁Syn ap se ▁( des p ite ▁many ▁offers ▁of ▁employ ment ▁from ▁new ▁startup ▁E A ▁games ). ▁ ▁Works ▁ ▁At ari ▁ 8 - bit ▁▁ ▁J aw bre aker , ▁Sierra ▁On - Line , ▁ 1 9 8 1 ▁ ▁F rog ger , ▁Sierra ▁On - Line , ▁ 1 9 8 2 ▁ ▁M ous k att ack ▁ ▁M ane u ver ing ▁ ▁Bank ster ▁ ▁MA E ▁ ▁At ari ▁ 2 6 0 0 ▁▁ ▁J aw bre aker , ▁T iger ▁V ision ▁ ▁Am iga DE ▁▁ ▁G obb ler ▁ ▁Sol itaire ▁ ▁Emp loyment ▁▁ ▁P uls ar ▁Inter active ▁Cor p ., ▁ 1 9 9 7 – 2 0 0 3 ▁ ▁T ach y on ▁Studios , ▁Inc . ▁ ▁At ari ▁ ▁Syn ap se ▁ ▁Sierra ▁On - Line ▁ ▁References ▁▁ ▁Inter view ▁with ▁John ▁Harris ▁regarding ▁H ack ers ▁and ▁his ▁career ▁and ▁views ▁on ▁game ▁development ▁ ▁Inter view ▁with ▁John ▁Harris ▁regarding ▁developing ▁for ▁Am iga