Has this ever been investigated ?

Found this picture collage of schoolgirls gore. Seems like game CGI to me but I can't find any information trough reserve image search. The one with a girl bashing another girl's head into a wall seems like it could be a lead. (Link below, NSFW)

https://4.bp.blogspot.com/-yPyBooIGB7k/UlhVnZ7QIUI/AAAAAAAAR20/auf2hzxwtMA/s320/tumblr_mezw2pIiqf1s0oe4go1_400.jpg