Quake: Abyss of Pandemonium (1998)

Abyss of Pandemonium - The Final Mission is a unofficial commercial partial conversion for Quake developed by Impel Development Team and published by Perfect Publishing. It was released on April 14, 1998. It includes 16 new levels (10 single player/6 death match), six new foes, four new weapons and 1 power-up.

• Release Date: April 14, 1998
• Developer: Impel Development Team