Games like Sigmund the Mouse

If you finished Sigmund the Mouse, the closest matches are Cactus McCoy and the Curse of Thorns, Cactus McCoy 2: The Ruins of Calavera, Majoriko Inbikai Inbizone, Flatline and Samurai Sam. All 6 share its hack and slash/beat 'em up genre and are ranked by how closely their themes and modes overlap.