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Baldur’s Gate 3 fans have created their own ad-free wiki
(www.polygon.com)
Baldur’s Gate 3 is a story-rich, party-based RPG set in the universe of Dungeons & Dragons, where your choices shape a tale of fellowship and betrayal, survival and sacrifice, and the lure of absolute power. (Website)
If your post contains any possible spoilers, please:
Thank you!
uesp.net is another one. It's actually quite a bit older than fandom but I'm still going to count it.
UESP is ancient in game wiki terms, even just internet terms, wasn't it made shortly after the release of daggerfall?
Arena was 94, uesp was 95, and daggerfall was 96. It was originally fansite that followed development news for daggerfall.