An unofficial third expansion pack, Abyss of Pandemonium, was developed by the Impel Development Team, published by Perfect Publishing, and released on April 14, 1998; an updated version, version 2.0, titled Abyss of Pandemonium – The Final Mission was released as freeware.
Paket ekspansi ketiga tidak resmi, Abyss of Pandemonium, dikembangkan oleh Impel Development Team, diterbitkan oleh Perfect Publishing, dan dirilis pada tanggal 14 April 1998; Versi update, versi 2.0, berjudul Abyss of Pandemonium - The Final Mission dirilis sebagai freeware.