is piracy always a sin no matter what you download?

is piracy always a sin ? i have games from old consoles and emulators of arcade and console many of these games are not avaliable anymore but on internet so if i download music games programs am i sinning ? is sharing content a piracy act and a sin against God ? i know we must obey the law but depending on the country is not ilegal (i.e in spain is not illegal downloading )