Ultra Dimension Defense seeks a formidable contender to claim the throne. Players gather in the arena to embark on quests and showcase their skills. To reach the final round, you'll need to conquer challenges across various levels. As the player, you take on the role of Kay, guiding him to throne domination. All leaders will convene in the Abandoned City to assign roles. Warriors engage in one-on-one duels to identify the most suitable candidate. You possess a unique set of attack skills for emergency situations. The character's actions are directed by player inputs. Your goal is to become a swift and precise warrior.

Enhancing skills will significantly bolster your hero's power. Ultra Dimension Defense enables players to upgrade when items are accessible, or by spending coins to expedite the process. Each warrior is accompanied by 11 allies to assist in boss battles, acquired throughout your quests. The ultimate team will be assembled to prepare for the final contest for the throne. Moreover, the game presents over 100 stages of this captivating narrative. Players will progress through each chapter, accumulating points. The system identifies the player with the top performance in each battle mode.

Your adversaries are also formidable warriors in Ultra Dimension Defense. Soldiers are categorized into 13 types, allowing players to easily assess their capabilities. Additionally, you will encounter and battle bosses in the concluding showdown. The key to overcoming these challenges is enhancing the combat skills of your entire squad. Furthermore, devising an effective strategy is crucial for victory. The arena is set in urban streets or amidst buildings for convenient movement. Players can summon allies during matches. Each character's health is displayed on-screen for easy monitoring.