There are some others that are similarly placed - Stardew Valley, arguably Minecraft (or GTNH heh).
I think the problem for the studios is they don't know HOW to do those 30 million dollar games, but they're really good at the 300 million dollar ones, and they're not selling to the users, they're selling to corporations (think Microsoft/Playstation/Target).
(It's also rare you have a game that is allowed to improve the way Minecraft, Factorio, or Stardew Valley have; go back and play builds or releases from around "when they went big" and you'll find they're horribly rough - I love Minecraft 1.7.10 but I simply cannot play without the QoL mods from GT:NH for long.)
[–] Folcon 2 days ago
[–] rcxdude 2 days ago
[–] bombcar 2 days ago
None of them can you build a successful business strategy around, really, because the vast majority of games like that do NOT succeed.
Honestly I think this is the hardest thing, I've spent a bit of time now trying to look at how indie works, including building out a small team to put something together and you either need to get funding, or it's pretty gruelling.
You can build something small slow and steady, but you've got to luck out and hit the zeitgeist if you don't want your project to collapse for a lack of money.
Or you have to have someone support you, I mean Stardew Valley famously was building for 4 years before they released, with his partner supporting him, that's a huge survivorship bias.
Project Zomboid is another game that comes to mind that's been being built for a long time for a dedicated community. However they managed to get a paid prototype out early, even though they had cash issues and a fair bit of bad luck.
Not sure what the story behind Factorio is come to think about it.