Ninja Nightmare is a free online ninja game developed by Ur Games. The action script is designed by Alexander Asvegren. The graphics in the Ninja Nightmare game is the artwork of Bill Northcott. The music score in the background is called Laghurim the voice of the ninja boy, performed by Hobbes The Prince and Tesm.

In Ninja Nightmare, players can play in two modes including normal and survival mode. The normal mode is easier than the survival mode. You have to compete against a timer in both the normal or survival mode. The count of the ninja you killed will be displayed on top of the screen.

The movement of the character is controlled by the right and left arrows. If you want to attack, you can press the A button. The player can only use the kick move to defeat the enemy. It does not include other types of special moves such as punching, sword slash and etc. To avoid kicking too many times, you must stand at an appropriate distance. If you stand too close to the enemy, you won't be able to injure the enemy. If you stand at the right distance and kick, the enemy will be defeated in one blow.

To jump, you must press the up arrow on your keyboard. The mission of the player is to kill all the ninjas within the limited time. If you are unable to defeat the ninjas in the allotted time, the game will be over. You should avoid wasting time in the game. You must keep on moving forward in the game and defeat all the ninjas so that you can win the game within the limited time frame.

According to the storyline of Ninja Nightmare, the main character, a blonde boy, happened to be reading the book when the Ninjas come to disturb him. He was annoyed with the irritation caused by the ninjas as he couldn't concentrate on reading the book. To stop the disturbance, he decided to go out and face the ninjas on the street.

In the first level of the normal mode, you will be faced with one ninja. The total number of ninjas that you have to kill is shown at the bottom of the screen. The remaining time of the game is displayed at the bottom and top of the screen. In the survival mode, a lot of ninjas will keep coming to you and you have to fight them off.

The health bar is located on the lower right corner of the screen. If you let the enemy hit you, the health bar will be depleted quickly. The health bar deplete quickly so you have to take action fast. When the health bar reach zero, the game will be over. You can play the game over and over again if you lose.

Overall, this free online ninja game is suitable for both children and teenagers. If you have nothing to do, you can play the Ninja Nightmare to kill some time.