Rance VI: The Collapse of Zeth

Backstory
After offending a high-ranked magic user in the kingdom of Zeth, Rance is ironically thrown into the slave camp while his magic-using slave Sill is treated as a VIP. Vowing vengeance, Rance joins up with an underground resistance group that is determined to overthrow Zeth's government so he can take revenge (and be reunited with Sill).

Trivia

 * A poster of Big Bang Age is seen in one of the mazes in Rance 6