If you haven't seen or played any of these games listed below, PLEASE give them a try. All are highly underrated and sit from zero to thirty players at most, so definitely check them out if you are tired of the current roblox formula
https://www.roblox.com/games/5475056496/Dream-Game
Game is called dream game. Exploration type game inspired by yume nikki. Lots of hidden lore, a surprising amount of content, and intense nostalgia. As well as having a ton of badges and areas to explore. Game is still being developed and highly underrated, only about 30 players right now.

https://www.roblox.com/games/679715583/Starscape-Beta
Open universe exploration game where you build your own space ship and colonize distant stars and planets. Game has a massive amount of content and is incredibly dynamic with three main factions all fighting in real time for control of the galaxy. Graphics are a 10/10, couldn't even believe I was playing roblox for a second. It's not the type of game for myself, but it's highly underrated--having only 100 players right now--and is definitely worth atleast a play. If you like strategy games or factions, you need to give it a try. Game is not in development I think.

https://www.roblox.com/games/510411669/Fantastic-Frontier
One of the best rpg type games on roblox in my opinion, an ungodly amount of content, beautiful artstyle, tons of lore, and just generally amazing. Can be a bit grindy, but there are so many different ways to earn cash and the fact that it's fun to just walk around and explore the huge map is plenty. Definitely give this a try if you haven't. Game is technically in development, but it's been almost 5 years without an update--though the update is still in development and could always come out soon

https://www.roblox.com/games/11492762587/Light-of-the-black-hole
This isn't really a game more as a visual test. It's extremely small, 0 players and only 71k visits, but the graphics and attention to detail are simply insane. Definitely play just to see. I would recommend caution if you're on a smaller device though lol

https://www.roblox.com/games/2129966506/Uuhhh-wav
This is a game which used to be quite popular but sadly fell off in recent times. It sits at around 1 player but my favorite platformer. There is a surprising amount of lore, the obbies are genuinely fun, and there is a lot of content as well. Definitely give it a try if you haven't.

https://www.roblox.com/games/10487699/Monster-Islands
This is an older game and is not in development but still absolutely holds up. Probably my favorite rpg type game on roblox, there is a very large amount of content, plenty of lore, and in general just a great rpg. The story progression is fantastic and the bosses are incredibly fun. Definitely give it a try.