Play Styx: Master of Shadows! It's one of the best stealth games, totally took me by surprise... Beautifully vertical environment with multiple paths that can lead to your destination, side missions and cool skills to develop, colorful main character that doesn't have moral dilemmas when killing is in question, thinking only how not to get discovered by ruthless guards and elves. Styx will remind you of Dishonored and Thief, but still bring something refreshing to stealth gaming.