Ninja Gaiden (NES)/Gameplay

Death
When you die, you lose a life and go back to the start of the current section of a stage. In addition, if you have any weapon power the amount will be divided by 2 and rounded down (e.g. 7 becomes 3).

Power-ups
Power-ups include points, weapon energy, and weapons.

Points

 * Blue points:
 * Orange points:

Weapon energy

 * Blue energy: 5 energy.
 * Orange energy: 10 energy.

Weapons

 * Shuriken: uses 3 energy, throws horizontally until it hits something. Deals 1 damage.
 * Windmill star: uses 5 energy, throws horizontally until it goes out a certain distance, then it returns like a boomerang. Deals 1 damage. If you jump over it as it returns, it will fly behind Ryu. This can be repeated multiple times to use it like a shield. The star will disappear after a couple of times back and forth or if it goes outside of the screen. The windmill star will go through enemies so it can hit multiple.
 * Fireballs: uses 5 energy, shoots two fireball-like projectiles at two angles (~30 degrees and ~60 degrees), deals 1 damage. Will disappear after hitting an enemy.
 * Fire shield: uses 0 energy. Surrounds Ryu in a shield that can be used to kill enemies just by running into them. It only lasts for ~10 seconds.
 * Jump and Slash technique: uses 5 energy. Can only be used in the air. When attacking normally, Ryu will curl into a ball and flip over and over again with his sword out. This makes him invincible and it will kill all enemies and projectiles it touches. It has a short range and will immediately stop when he touches the ground, so be wary of projectiles.