, ▁which ▁was ▁later ▁expanded ▁and ▁rep ack aged ▁as ▁Od ys sey : ▁The ▁Comple at ▁Ap vent ure . ▁Dun geon ▁Camp aign ▁/ ▁W ilder ness ▁Camp aign ▁is ▁one ▁of ▁the ▁earliest ▁D & D - like ▁games ▁that ▁is ▁ep ic ▁in ▁scope ▁( comp ared ▁to ▁the ▁more ▁common place ▁" d unge on ▁craw l " ▁games , ▁such ▁as ▁Temple ▁of ▁A ps hai . ▁ ▁Syn erg istic ▁also ▁published ▁a ▁number ▁of ▁business ▁applications , ▁including ▁a ▁word ▁processor ▁and ▁a ▁simple ▁database ▁program . ▁ ▁Un like ▁many ▁other ▁companies ▁that ▁could ▁or ▁did ▁not ▁make ▁the ▁jump ▁to ▁other ▁platforms , ▁Syn erg istic ▁continued ▁as ▁an ▁independent ▁developer ▁as ▁the ▁IBM ▁PC ▁D OS ▁platform ▁became ▁dominant . ▁Poss ibly ▁the ▁most ▁successful ▁titles ▁they ▁port ed ▁during ▁this ▁period ▁were ▁The x der , ▁a ▁side - scroll ing ▁shoot er ▁game , ▁and ▁Sil phe ed , ▁a ▁ 2 D ▁shoot er ▁( develop ed ▁by ▁Game ▁Arts ▁and ▁published ▁by ▁S ega ▁for ▁the ▁S ega ▁CD ▁console ). ▁ ▁Syn erg istic ▁was ▁acquired ▁by ▁Sierra ▁On - Line ▁in ▁ 1 9 9 6 . ▁They ▁maintained ▁their ▁identity ▁as ▁an ▁independent ▁development ▁group ▁within ▁Sierra ▁for ▁several ▁years . ▁However , ▁the ▁studio ▁was ▁closed ▁on ▁February ▁ 2 2 , ▁ 1 9 9 9 . ▁ ▁Games ▁ ▁Camp aign - Ad vent ure ▁series : ▁Dun geon ▁Camp aign ▁(