Classes are a gameplay mechanic introduced in Sinjid Shadow of the Warrior. Classes offer the player the opportunity to specialize in certain skills, allowing for more customization. Sinjid's class is chosen by the player after beginning a new gamefile, and cannot be changed unless the player starts a new file. Sinjid Shadow of the Warrior has four classes: Balanced, Warrior, Spell Caster, and Shadow Ninja. Each class has different strengths and weaknesses. In addition, their statistics grow at different rates. While each class can potentially learn all the Skills, most players limit themselves to those that support their chosen class's stat.