Portals of Twilight is a supplement for fantasy role-playing games published by Judges Guild in 1981.

The book describes 32 wilderness locations and a city, and provides game statistics for new monsters.

[1] Portals of Twilight was written by Rudy Kraft, and was published by Judges Guild in 1981 as a 48-page book.

Judges Guild was able to keep their Advanced Dungeons & Dragons license for another year, allowing them to publish adventures like The Illhiedrin Book (1981), Zienteck (1981), Trial by Fire (1981), and Portals of Twilight (1981) before ending that line.

"[3] Stackpole continued: "In this work, Rudy Kraft does a fine job of setting up atmosphere and all that in the first ten pages.