Aww man... this just brought back a flood of memories playing this with my brother when we first had our NES.

It was called 'Shadow Warriors' in the UK but the name was the only thing that was different. My one overriding memory is the cool introduction sequence... this is probably because we got our arse handed to us so often on the first level.

It was a cracking game. My younger self couldn't handle its '8-bit difficulty' though