Contrary to its two purely role-playing predecessors in the comedy fantasy franchise Slayers video game entries, Royal is a tactical RPG.

The game is split between Adventure Mode and Battle Mode: Compared to the previous Slayers games, the use of CD-ROM as media enabled addition of FMV cutscenes and a large amount of digitized voice sampling, featuring the voices of Megumi Hayashibara, Maria Kawamura, Yasunori Matsumoto, Masami Suzuki, Hikaru Midorikawa and other main actors from Slayers anime productions.

In the game's storyline, Lina, Gourry and Naga encounter an elf boy named Lark (ラークの) being attacked by the mazoku demons.

Eventually, they discover the real power of this legendary relic: with it, the mazoku can resurrect the demon king Ruby-Eye Shabranigdu and destroy the world.

[8] French magazine Consoles + gave a review score of 90% for the Saturn version, comparing it to Riglord Saga and Sakura Wars,[6] and later also 87% for the PlayStation port.