Sacred Citadel is visually appealing, but nothing about it stands out. It employs an aesthetic that suggests a three-dimensional cartoony vibe and sticks with it through a number of different (but standard) environments. Solid colors and simple designs make up the rest of the presentation, and it works rather well.
Sound is par for the course: functional, but nothing to jump up and down about. The music is a light mix of epic sword and sorcery and elements of rock and electronica. There's no real sense of identity, and I suppose that's alright. Sound effects aren't offensive, and the voice acting that's here is cheesy (and it knows it is).