When I was younger, I was obsessed with playing this MMORPG known as Hello Kitty Online. Yes, I know a Hello Kitty MMO sounds super childish and silly, but it was actually super fun and had charming graphics and soundtrack. Unfortunately, the game quietly shut down in 2017 due to a lack of players. There's not that much information on the game available on the internet nowadays and I rarely hear anyone talking about it, so this could potentially count as lesser known media or even lost media since it shut down. There are still a couple trailers and gameplay videos available on YouTube though.
Woah, that trailer looked awesome! Somehow I missed this game being announced, I totally would have played it. I hope that Sanrio reboots this game. Can you tell us more details about what the gameplay was like? I'm really curious.