Newspapers? How boring. I would want to be able to read the text in video games and manga!
On a semi-related note, I heard of someone who learned English largely by playing Final Fantasy 7 with a dictionary in hand. [Also learned practical bonus vocabulary like "mako energy" and "materia" I assume. ;-) ]
Reading and understanding video games & manga is more challenging in that the way the people speak in these situations is much more informal, i.e. lots of slang.
You won't be able to get to the latter without spending some time on the former because the grammatical structures in idiomatic Japanese are full of contractions that arise from the spoken language.
Just as an aside, if you actually spoke like a manga/game character, you'd definitely raise some eyebrows. Probably not in a good way ;)
I think that's a matter of interest. I personally like reading the newspaper but I am more of a fan of online news than newspapers, my personal favorite being: https://news.tv-asahi.co.jp/