This was something I started wondering about when I was reading a thread about Star Citizen, and about how space combat flight games were much less-common than they had been at one point, how fans of the genre were hungry for new entrants.
Looking at this list:
https://en.wikipedia.org/wiki/List_of_space_flight_simulation_games#Space_combat_games
…there really were far more games in the genre being released in the late 1990s and early 2000s than there have been recently.
A similar sort of phenomenon occurred for World War II first-person shooters.
https://en.wikipedia.org/wiki/List_of_World_War_II_video_games
Back around the same time period, there was a glut of games in the genre, and they really have fallen off quite a bit.
Whether it’s a genre like these two, that hasn’t seen many new entrants recently, or a genre that just never grew as much as you’d like, what genre would you like to see more of?
Single player card games. I just want a good card game where the PvP mode is optional. Curse you games as a service.
Inscryption?
Cultist simulator, even
Slay the spire? It’s a deck builder rouge like. Excellent game. Dunno if it’s what your looking for but I highly recommend it.
If you haven’t looked recently, you might take another look.
I felt the same way when Slay the Spire came out in 2019 – not a lot of similar games at the time, and I couldn’t figure out why more developers hadn’t made similar games, as it seemed like a very good match for indie studios. But there have been a whole lot of games that came out since then.
Searching Steam for games tagged as single-player and deckbuilder, and sorting by user review
I get over 600 hits, almost all of which came out in the past three years. I’d say that single-player deckbuilders – and note that I’m assuming that you’re talking about deckbuilder games, not, say, solitaire implementations or similar, as I think that there are pretty good entrants there – are actually doing pretty well.