I don't think that really changes anything, just restricts the effective criticism to that specific part that you did. Though I suppose the more it's intertwined the less it matters. I don't think anyone really cares about that one function in the company codebase that's been rewritten 20 times by different people, and far more about that part of the game they coded themselves at a gamejam.
There's always external influence, but if you're involved you obviously added something and in most cases it can be scrutinized on its own merits.