#GreenBeret is a hard game to love because Green Beret is a hard game to play! It got ports though, so comparisons must be made.
A simple game: run to the right, murder fools with your knife and healthy fear of communism.
#Amstrad is worst of all. Your guy looks like Robin Hood and it's hard as balls. #Spectrum is better. Crisp graphics, but hard as balls. The #C64 port looks great and plays well but has some obscene hit boxes. Also balls hard.