Welcome to the Exciting World of City Arena!

Embark on an enchanting adventure in this mesmerizing idle RPG mobile game. Lead heroes from five diverse factions - Mech, Bio, Gene, Mystic, and Aliens - to epic quests and battles, and become a legendary hero in this fairy tale city.

Defend Your Tower with Strategic Prowess

Eliminate waves of monsters to strengthen your defense tower and secure victory. Defeat monsters to collect skills and strategically assemble them to fortify your defenses. Be careful not to let too many monsters park on the field, or judgment will fail!

Collect and Summon Over 200 Unique Heroes

Summon heroes from the different factions, each with their own unique design - wild, cool, adorable. Create a squad that is uniquely yours by freely mixing and matching heroes. Pay attention to attribute resistance, Hero Bonds, and formation for victory.

Engage in Various Modes for Rich Rewards

Experience thrilling content beyond battling and collecting items. With modes like Mysterious Maze, Trial Array, and Mysterious Cavern, challenge yourself to earn generous rewards and resources without spending a cent.

Compete in Ace Tournament for Adventure

In the Ace Tournament, wage war against other Guilds in a league event. Build your base, expand territories, customize your squad, and climb the leaderboard to earn awesome rewards. Join forces with Guild members to rise to the top!

Immerse Yourself in an Epic RPG Experience

City Arena offers hassle-free gameplay, diverse hero collection, rich combination elements, and various modes for endless entertainment. Dive into this captivating world, unleash your strategic prowess, and lead your team to victory!

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- All new Bio Hero “Silent Slayer" has arrived!
- Hero balance adjustment: Julia's “Blooming Rose” skill has been changed from “Deals damage equal to 520% of ATK to all enemy units every second” to “Deals damage equal to 780% of ATK to all enemy units every second. “Julia's Monument” skill has been changed from “Julia gains 100 Energy when resurrected” to “All ally units gain 100 Energy when Julia is resurrected”.
- Fixed other known bugs.