Sidewinder, or Xiang Wei She in its Asian release, is another example of an unlicensed NES title, as indicated by "(Unl)" and "(Sachen)", pointing towards a third-party developer or publisher active in the Asian market. The game, likely a side-scrolling shooter based on its name, probably features a snake or serpentine-like element in its gameplay. The limited documentation makes it difficult to confirm any specific details.

Sidewinder - Xiang Wei She (Asia) (Unl) (Sachen) (NES)

Side Pocket (Europe)