First time I hear about the instance and hadn’t looked into the engine before, but it seems awfully like Misskey. And as I don’t use Misskey much, I can’t draw comparisons to what I see.
But at least from a quick glance for point 7, it does support tags:
Maybe can ask also on !patientgamers@sh.itjust.works?
There’s also games without DRM on Steam if you’d rather not spend more that what’s been gifted. As Steam itself doesn’t track those, there’s those two wikis keep track of it if you want:
https://steam.fandom.com/wiki/List_of_DRM-free_games
https://www.pcgamingwiki.com/wiki/The_big_list_of_DRM-free_games_on_Steam
Besides Mbin, from what I tested, Misskey also has some level of integration between threads and microblogging, further than Mastodon ⇄ Lemmy at least. Also from what I read, apparently Friendica tries to be hybrid like Mbin too.
Iirc the maintainer of the wiki has a sister group in Steam’s forums, so people could ask him to migrate the wiki.