I don't think anything technically *wow* came out of the US until Doom.
US games on the C64 were always a bit 'old-fashioned' in the techniques department.
I would disagree... the above games I mentioned were a completely new style...
Raid Over Moscow was a revelation at the time and more so Beach Head I and II... featuring speech.... 'Hey ! Dont shoot me!' and a higher standard of art/animation than the UK had seen before...
And lemme throw 'Impossible Mission ' and Summer Games into the arguement as well!
The americans were technically miles in front at the time...
Spy vs Spy? stunning game... two player fun and presented in a great way.
Obviously these are all c64 titles because the spectrum flopped badly over there...
Uk software was far behind until 85.. IMHO and then really seemed to hit it's stride...
Last Ninja
Uridium
Paradroid
Iridas Alpha...
All classics and worthy of a place on any 64 owners shelf...!
Dont force it up.... you'll break my heart.