Is Ninja Gaiden on Steam?

No. Ninja Gaiden is not distributed on Steam, so there is no Steam Charts or SteamDB player count for it. Its live popularity is tracked here via Twitch viewership instead.

What platforms is Ninja Gaiden on?

Ninja Gaiden is available on Nintendo 3DS, Wii, Family Computer, Wii U, Nintendo Entertainment System.

When did Ninja Gaiden release?

Ninja Gaiden was first released on December 9, 1988.

Ninja Gaiden

Dec 9, 1988PlatformHack and slash/Beat 'em upAdventureNintendo 3DS Wii Family Computer Wii U Nintendo Entertainment System

Ninja Gaiden — frequently asked questions

Is Ninja Gaiden on Steam?: No. Ninja Gaiden is not distributed on Steam, so there is no Steam Charts or SteamDB player count for it. Its live popularity is tracked here via Twitch viewership instead.
What platforms is Ninja Gaiden on?: Ninja Gaiden is available on Nintendo 3DS, Wii, Family Computer, Wii U, Nintendo Entertainment System.
When did Ninja Gaiden release?: Ninja Gaiden was first released on December 9, 1988.

About Ninja Gaiden

Experience the original adventure of Ryu Hayabusa, the shadow warrior, in this acclaimed and challenging action-platformer from the NES era!

Summary via IGDB.

Ninja Gaiden on Wikipedia

Ninja Gaiden is an action game franchise created by Tecmo. The series was originally known as Ninja Ryukenden in Japan. The word "gaiden" means "side story" in Japanese. The original 1988 arcade game, first two Nintendo Entertainment System (NES) games and the Game Boy game were released as Shadow Warriors in PAL regions. As of 2008, the series had shipped over 7.7 million copies worldwide.

Source: Wikipedia (text under CC BY-SA 4.0).