How do you guys discover new games that can't afford advertising?

That sounds extremely ineffective and like a huge waste of time honestly
Have you actually managed to find anything at all?

igg-games.com/
skidrowreloaded.com/
thepiratebay.org/browse/401
rlslog.net/category/games/pc/feed/

reported

I don't, and when I find a game that looks good long after its release I wonder why the fuck I didn't find it before.

I come to Holla Forums, follow niche non cancerous journos, check the upcoming, popular releases on Steam.
Dig up on GoG, Humble and Indie/ModDB

you should found a website that is for curatoring steam games and does weekly features of worthwhile and notable games. You would exclude ALL early-access and put them in thier own category ect. All the annoying shit of searching through Steam, you'd do it for people. It'd be very successful.

Holla Forums never talks about good new games

in here, or lewdgamer, or nichegamer, or just blind luck.

...

There's plenty of good new games, just none of them ever are played by people here