Imho, with a bit more polishes graphics (Like the new X-Com) you would have an AA Title. Lots of friends liked the old X-com and would love to play bionic dues I am sure... but the combinaton of bad graphics and no german translation kinda doesn't make it interesting.
You should really try to get your games translated to german, there is a huge market for such games there
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And when I think of polished graphic, I think of bejeweled (the pc version). It doesn't have to be much graphic, is just has to look neat
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