Nothing to be nervous about xD
I mean, the games I like are mostly overlooked, for some reason (with some rare exceptions)
Like, for example, I love this little game that is extremely cheap and not popular at all -
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. Just, check it out - faster than me explaining it xD
Siralim series. The Void Rain Upon Her Heart.
Or pretty much every Nippon Ichi Software game (Disgaea, Labyrinth of Refrain, Phantom Brave, ZHP, Soul Nomad (especially Soul Nomad))
Falcom games such as YS series and The Legend of Heroes series (well, it's a bit more well known, but still a niche)
Exception would be Omori, it blew up and sold well, which I did not expect at all and was a good surprise for me. Another one would be Undertale (and Deltarune), I noticed it since it was on kickstarter and was quite shocked it blew up as it did. I attribute it mostly to music, some of my friends found it only because they heard it on some youtube videos or something.
About online games...Yeah, Limbus Company, Heaven Burns Red and a new gacha Wizardry.
And, well, I just love idle games, like Idling to rule the gods or Trimps, for example.
If there would be a video about "Niche game that you should try" all these would be there that's for sure xD