Complex sentence: The game spawned a 1991/1992 sequel, Barbarian II (in the era of Leander, Ork, and Armourgeddon), another platform-based action-adventure from Psygnosis.
Split into simpler sentences: The game spawned a 1991/1992 sequel, "Barbarian II". It was set in the era of "Leander", "Ork", and "Armourgeddon", other platform-based action-adventures from Psygnosis.