Mamono Saber is a one-button arcade game where you are in control of a knight who can only move forward at a steady pace, determined to rescue the princess and save the kingdom once again. Our hero jumps whenever the player clicks on the screen, while the outcome of a battle is determined automatically by the manner in which the protagonist comes into contact with a monster. A normal enemy is defeated if you touch it with the tip of your blade, although bosses will require a couple more hits before admitting defeat.

The game can be tricky to beat as players are only allowed one try to complete the entire quest, but with a bit of perseverance it shouldn't be too difficult of a task since health can be replenished rather frequently during the rescue mission. There are four levels to play through in total.