This is really a great news that these games are viewable online or down-loadable as a zip file. Even I would like to play such games after downloading it as an SGF file. In this technical world of video games, Haven't you ever tried Pre-ordering the CD key of the particular games? My cousin always uses to Pre-order the CD keys from the website like https://www.instant-gaming.com/en/
, Cd keys, etc. This only requires to activate the Key number which you will immediately received after buying it.