102GB for black ops 6, though duckduckgoing reveals to me that apparently you can just not download the story mode if you only want to play multiplayer, and that saves around 30GB.
But the joke is (and it does seem to be a joke) that AAA games only ever get bigger year over year, and with 128TB drives actually in people’s hands (not in consumer’s hands for many years but ¯_(ツ)_/¯ ) the idea is that eventually AAA studios will make use of that to increase game asset size.
creaminstaller works under linux and can find steam games inside your home folder (not sure about elsewhere) if you run it as a third party exe in steam with proton