Not bad, but when counting sales inflation of games compared to the 90's its really closer to being 5 million to OOT's 7.6. Take the best selling game of this gen and compare it to the best selling game of the ps/n64 gen to find the difference then divide BOTW numbers with that difference to get pre inflation sales numbers. Decent but not ground breaking
The best selling game of the 5th gen was Pokemon Red/Green/Blue at 31.37 million, and the best selling game of the 8th gen is Call of Duty: Black Ops 3 at 26.46 million. I guess that means Breath of the Wild on Switch alone has actually sold 10.05 million when compared to OoT's 7.6 million.
Oh wait, never mind. I forgot, we're in the 9th gen now because of the Switch. So... the best selling 9th gen game is Super Mario Odyssey at 10.41 million...
Breath of the Wild on Switch has sold 25.55 million when compared to OoT.