5 Minutes of Frozen Over - 115,931,600 pops (btd6)

This is probably my favourite quest so far, it's such a fun one to optimize. Races are cool but this "reverse race" system is so much fun to optimize. If they ever make this into some sort of weekly event, though (which I hope they do), Tsar Bomba and Antibloon are gonna have to always be banned.
This run is definitely not optimal, basically every part of it can probably be improved upon. Still, I don't know if anyone else has posted a run that (legitimately without the game bugging out) reaches a 9 digit pop count yet. Someone better at races will probably beat me, though, if any of them see this run.
That DDT at the end was very scary