Retired Ninja Runner is a free endless runner game. The world of side-scrolling endless runner games is full of excitement and adventure, and this particular game adds a unique twist with a ninja as the protagonist. As players navigate through various levels, they will take on the role of a retired but skilled ninja who must fight other ninjas while avoiding the charms of beautiful women. The game's setting is the rooftops of a major metropolitan city. The player will control the ninja as he runs, jumps, and attacks his way through this endless game, battling hordes of enemy ninjas along the way. To add to the challenge, the player must also avoid the pigtailed women who populate the rooftops. The women will appear at various points throughout the game, and the player must avoid smashing into them. 

The gameplay mechanics are similar to other side-scrolling endless runner games, with the player using intuitive touch controls to jump attack. As the player progresses through the game, they will earn points for defeating enemies and collecting power-ups. These points can be used to unlock new hats for the ninja. The game's graphics and sound effects are top-notch, with vibrant colors, detailed backgrounds, and realistic sound effects that immerse the player in the world of the retired ninja. The game's music creates an atmosphere of high-energy action and adventure. Overall, this side-scrolling endless runner game about a ninja fighting ninjas and avoiding girls is a thrilling and engaging experience that will delight fans of action and adventure games. With its intricate, challenging gameplay, and immersive graphics and sound effects, it is a must-play for anyone who loves to test their skills and push themselves to the limit.