Play Ninja Ryukenden II - Ankoku no Jashin Ken (Japan) Online

Ninja Ryukenden II, known as Ninja Gaiden II outside Japan, came out on the NES in 1990 from Tecmo. It was part of that wave of late-era NES action games that really pushed the hardware, with detailed graphics and cinematic cutscenes that felt ambitious for the time. You play as Ryu Hayabusa, a modern ninja out for revenge.

You control Ryu, running, jumping, and climbing through side-scrolling stages to defeat an evil deity. Your main goal is to fight through six acts, each ending with a boss. Key mechanics include using a primary sword attack, collecting ninja magic for screen-clearing attacks, and wall-jumping to navigate tricky platforming sections. The pacing is relentless, and the difficulty is notoriously high, demanding precise timing and pattern memorization. It feels like a constant, tense duel against the game itself.