- Sunburst Contamination (with Johan Berntsson, together as "Att Scoddams"; 1988 (stated as 1982 in the game); Commodore 64).
- Z-code port: (porter: Johan Berntsson; 09-Mar-2007; Z-code 6).
- The Terror of Mecha Godzilla: The True Story (1993; MS-DOS).
- The Hobbit: The True Story (with Johan Berntsson; 1993; MS-DOS). (There is also an unauthorized and altered port to Glulx)
- Vacation Gone Awry (with Johan Berntsson and Staffan Friberg; 1988; Z-code).
Fredrik ported these games to Z-code:
- Stuga (with Johan Berntsson) (Viggo Eriksson, Kimmo Eriksson and Olle E Johansson; 1978; DEC Basic).
- The Dragon and the Troll (Johan Berntsson; 1987; Commodore).
- The Black Ladder (Jan Åberg; 1985; Commodore).
- Rance the Dungeonkeeper (Jan Åberg; 1985; Commodore).
- Revenge of the Thing-Fish (Jan Åberg; 1985; Commodore).
- Unchanter (Jan Åberg; 1985; Commodore).
Translated to Swedish:
- Co-wrote the Ozmoo interpreter.
- Co-wrote the PunyInform library.
- Created Swedish Inform, a Swedish translation of the Inform 6 standard library.