Since mid-1970s, its members and founders - among them Krsto A. Mažuranić, Damir Mikuličić, Neven Antičević, Ivica Posavec - were included in organisation of almost every major initiative in Croatian science fiction, including the Sirius monthly magazine (awarded two times as the best European science fiction magazine, in 1980 and 1984[8]), which was founded and partially edited by SFera's members, then the Futura magazine, which was edited by Krsto A. Mažuranić, and also various attempts at local science fiction publishing, as well many fandom activities.
The major Croatian science fiction portal (and its online fanzine) NOSF is also run by the SFera members.
[10] Until 1991, the award was given for the area of the whole former Yugoslavia and its recipients were, among others, World Fantasy Award winner Zoran Živković, for his two-tome Encyclopedia of Science Fiction, Predrag Raos, Darko Macan, Igor Kordej, Darko Suvin, and Aleksandar Žiljak.
It's the longest-running and the biggest annual science fiction convention in South-Eastern Europe, usually attended by more than 2000 people.
[16] The guests of the convention, among others, were Frederik Pohl, Jack Williamson, Harry Harrison, Joe Haldeman, Brian W. Aldiss, James Gunn, Bob Shaw, Richard D. Nolan, Sam Lundwall, Paolo Eleuteri Serpieri, Gianfranco Viviani, Gerald Webb, Martin Easterbrook, Robert Silverberg, Karen Haber, Guy Gavriel Kay, Walter Jon Williams, Lois McMaster Bujold,[17] George R. R. Martin, Ken MacLeod, Michael Iwoleit, Michael Swanwick, Bruce Sterling, Richard K. Morgan,[18] Ian McDonald and R. Scott Bakker.