This is a liberated game: it was originally sold as shareware, but in January 2020 author Martin Bourdages made the full registered version available as a free download.
Ook bekend als Chain Reaction
Puzzle, 1995Shareware
Puzzle, 1993Freeware
Puzzle, 1992Shareware, Shareware
Puzzle, 1991Shareware
Puzzle, 1994Shareware (installed), Shareware
Puzzle, 1994Shareware
Puzzle, 1996Shareware (installed), Shareware
Ook bekend als BOB
Puzzle, 1995Full version