In Hyperdimension Neptunia, a Combo Skill is a type of skill that can be assigned to a character to create attack sequences. The character may utilize up to four Combo Skills in a single sequence. If the player executes a certain combo in a sequence, the player is given a chance for a character to perform a skill called an End Bonus. Combo Skills can be assigned in any of the four inputs: Input 0, Input 1, Input 2, and Input 3. Input 0 are exclusive and cannot be customized.