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!
Read it so you don't have to - someone found a choice you can make in the second act that counts as an ending. So, they basically ran through act one and made that decision immediately.
They did not play through to what anyone would actually consider the end of the game.
If it did, I wonder in how many seconds they speed-ran Wasteland 3.