God Eater is a game. It does have an anime but with only 1 season to promote the game. The owner of the game is Bandai and they're very well known in Japan especially God Eater. I know I'm 4 years late but it just feels like lots of people don't know about God Eater and are probably hating on the people who sent a cease and desist. It is a good game but again, Bandai has to take some action because the logo and the name being used are copyright protected. We have laws we have to abide especially for things like copyrights. That's why (I guess most or all) songs used in Geometry Dash is free to use.
I dont know, knobbel likes to use music from zelda like 0:01-0:41 and in intro Maybe its Persona 5 soundtrack, cuz he uses it in outro: 1st, 2nd previews for orochi
