We‘ve been discussing the announcement over here as well: Hitman News Thread
On the high number I wrote:
I didn’t think about it at first, but you’re right. The 75 million number must include sales from H1 & H2. 75M for H3 alone, would put the game in the top 4 spot of best-selling games overall, even before Red Dead Redemption 2, which is a much bigger title (List of best-selling video games - Wikipedia). Technically, number of players and sales aren’t even the same, since some players own the game on more than one platform/launcher.