The saboteur does have it´s fair share of strange-sounding german coming out of american mouths
A common thing is that non-germans often tend to pronounce a soft S like a sharp S. The soldiers in the game for examples have this line: "Ich suche...ich suche" (I´m searching, I´m searching) which is stupid to begin with because it makes them sound like a databank-program :D The S on "suche" is soft but they pronounce it like the s in "search" for example. Apart from the fact that the "Ich" is often pronounced like "Ik"...which people from Berlin actually do but it still sounds different
It´s the beatuy of having sounds in one language that another doesn´t use often or even at all. Your rolling R is another good example, or the TH-Sound that maaaany germans can´t seem to get right no matter how hard they try...at least that gave birth to clearly german-spoken english...if you know what I´m trying to say...listening to german TV and writing english seems to confuse me a little...
I like this accent-business, it´s kinda fun for some reason, especially when the people that are supposed to speak german in games have accents so garbled and strange that I - an actual german - can´t understand them anymore :D