Karateka was good. Not quite as good as International Karate IMHO but better than Way Of The Exploding Fist.
Beachhead. Was that the game that US Gold released? I think I vaguely remember it. Something about a cannon on a ship and you had to fire at another ship by 'guessing' the right angle of the gun barrel. Something like that anyway :-)
I believe so. Its been practically forever since I've played with the C64. I seem to remember that, plus having to run between bunkers and blowing them up.