Yes, "even" works there.
Student or Learner
Is "even" correct? What is surprising in these words?"Mario has starred in hundreds of video games, even ones that don't make sense."
There is nothing surprising.
... except a general expectation of common sense. I have no knowledge of these games, but my understading is that sometimes they involved activities that didn't make a lot of sense - as, for example, in an early release of Facebook that allowed one to throw a sheep at a friend. One wondered 'Why?'
'Even' is also used to emphasize something unexpected, according to http://www.oxfordlearnersdictionarie...english/even_1
Perhaps the speaker did not expect that Mario would star in video games that didn't make sense.
Not a teacher.
I think I have found the reason why "even" and "though" have same meaning in my native language. They're same but mean different.