Killer is Dead

The main character, Mondo, wields a katana called Gekkou with his right hand for attacks and to deflect bullets. His left arm has cybernetic enhancements that can be used to solve puzzles or discover hidden areas. Mondo can turn it into a human hand to crack codes or change it into a ranged sub-weapon. Separate buttons are used to block and dodge, while defeated enemies leave behind body parts that recover health.

Mondo receives payments based on his performance after each mission. Upgrades through moon crystals are divided into three categories: attack skills, sub-weapon skills, and special skills. In the main office, various costumes for characters can be equipped when unlocked, as well as items in a gift shop. A mini-game allows Mondo to seduce women by taking pictures with Gigolo glasses.