I found this information from the old forum.
According to @Travis_IOI, the classic games used Felix Titling font on the logos, and the recent games used Neue Haas Grotesk font on their logos.
I’m not sure if this is official or at least accurate, but you will be able to find the font from the H2:SA’s logo by searching Hitman Font.
And Aurulent Sans Mono font has been used for IO Interactive’s logo, according to @cake941.
The one font I saved from my old computer 
gotta make those sleek H3 graphics 
I’m not 100% sure, but I think Gotham font was used for the concept arts by Simon Lindwall.
By the way, anyone knows what is the font used for the Seven Deadly Sins title? @Travis_IOI?
BankGothic Lt BT (already on your system if you have C47 - just need to install it)
you can find it in a bunch of C47 zips and folders:
there is some other stuff for C47, and then H2:SA/Contracts so I’ll probably update this later
the 7DS font is Streetbrush by Robert Arnow