There was a reddit post of pictures of the massacre that were very detailed and graphic. Came out a few years ago. These were never before seen pictures that the redditor had kept for years and decided to release them. I wish I had had the for thought to save them cause I can't find that post again at all. Only things there now are the same pics you see everywhere else.

I have to say though, it is amazingly annoying that nearly any search for Tiananmen Square usually just returns the "tank man" pictures, as if that's all there was to it.