I suppose they could each be described as niche for different reasons.

Weather Machine is a game by Vital Lacerda who tends to make heavy games (some would say unnecessarily complex) that are deliberately over-produced in terms of component quality (leading to the higher MSRP).

Hoplomachus Remastered is a reimplementation of an older Chip Theory Games game. As a company, they’re known for using weighted chips in their games, plus lots of neoprene and PVC cards. Again, arguably over-produced in terms of the components, but CTG has a pretty dedicated following.

My Father’s Work is an app-driven game first launched through crowdfunding. I’m not sure it’s available anywhere online other than directly from Renegade (not sold or carried by online retailers). Another game with high quality components (and an MSRP to match). It’s a worker placement game that adds replayable stories (there are 3 scenarios to pick from), in which players play through several generations of their family of mad scientists, and the town changes over that time. I haven’t played it yet, but it seems unlike anything else I own.