Ninja Crusaders (忍者クルセイダーズ 龍牙, lit. "Dragon Fang Ninja Crusaders") is a Nintendo Entertainment System game that is in the style of the original Ninja Gaiden trilogy of games for the same system where ninjas have to fight against aliens.

The game is a classic platforming ninja action video game that is similar to Ninja Gaiden. However, the game has its own unique feature. There are four animals the players can morph into by holding up or down + attack button: a tiger (Genbu), which is the fastest and can jump the highest but has the shortest range; a falcon (Suzaku), which has the ability to fly above everything but has no weapon at all; a scorpion (Hiryu), which for some reason can swim better than all the rest but moves very slowly on land; and finally a dragon (Seiryu), which can fly, is invincible, and kills everything in one hit, but the player can only use him for a limited amount of time.

The enemy's speed and unpredictability is what leads to the game's biggest downfall, level memorization. This can be good in some games, but Ninja Crusaders basically forces it on the player. The game is relatively easy to play until the player reaches Stage 3-2; after that, the game starts to get "ridiculously" difficult.