Pitted against the Bydo Empire, the "R-Type" class ship is humanity's
last hope of thwarting the impending invasion. Equipped with a sphere
like object, called the "Force," this weapon contains the only form of
energy strong enough to destroy the Bydo. Unfortunately, you've been
chosen as the delivery system for this weapon - so it rests upon you to
complete the mission.

Imagine a weaponized organic form, much like a virus, but millions of
times larger and you have the Bydo. They are completely manevolent, and
like a virus, seek only to infect and destroy all in their path. Mankind
has fought these creatures for hundreds of years and it's come down to
this moment.

In Ninja Gaiden II: The Dark Sword of Chaos, a new villain,
Ashtar, is revealed. Take on the role of Ryu Hayabusa and rescue
Irene Lew, a former CIA agent, from Ashtar. Destroy the Sword of
Chaos, a weapon of great power forged from the bone of a demon. Use
techniques such as the Fire Wheel or the Windmill Throwing Star and
attack while holding on to walls and ladders.

Use the most innovative technique of all - the ability to create
Shadow Clones, orange shadow versions of Ryu that will constantly
follow him, repeating previous actions (moving or attacking) in a
delayed cycle. Once again defeat henchmen, creatures and bosses with
new fighting techniques and even more weapons as you progress
through multiple stages on your way to destroying Ashtar, Jaquio and
the Realm of Chaos.

Dr. Robotnik has hatched a plan to ensure that no music or fun
remains on Mobius. To do this, he kidnaps the citizens of Beanville and
stuffs them into a giant robotising machine called the Mean
Bean-Steaming Machine, so that they become his robot slaves. The player
must now defeat each of the robot guards and Robotnik himself to foil
his evil plans.

In the game, a player must group 4 or more different colored beans
(or Puyos) together so that they erase, and send Refugee Beans (aka
Garbage, and Ojyama) to the opponent. The more beans that link up, the
more garbage is sent. Players may also activate step chains (aka Rensa)
so that even more garbage is scored. The game is decided when the third
column from the left is piled to the top.