So I can't figure out what 42 games they mean and what 22 exclusives there are. Of course I totally lost track during that ID@Xbox sizzle reel, and am not sure if they count Crimson Skies and the other games in the Xbox One X Enhanced section, but here's what I have. Maybe everyone else can help fill in the details:
Xbox E3 2017
42 Games, 22 Exclusives
01. Forza 7 (ex)
02. Metro: Exodus
03. Assassins Creed Origins
04. PlayerUnkown's Battelgrounds (launch ex)
05. Deep Rock Galactic (ex)
06. State of Decay 2 (ex)
07. The Darwin Project (launch ex)
08. Minecraft
09. Dragonball Fighter Z
10. Black Desert (launch ex)
11. The Last Night (launch ex)
12. The Artful Escape (launch ex)
13. CodeVein
14. Sea of Thieves (ex)
15. Tacoma (launch ex)
16. Super Lucky's Tale (ex)
17. Cuphead (ex)
18. Crackdown 3 (ex)
ID @ Xbox games
Ashen (launch ex)
Life is Strange: Before the Storm
Middle Earth: Shadow of War
Ori and the Will of the Wisps (ex)
Xbox 1 BC:
Crimson Skies
Xbox One X Enhanced:
Final Fantasy XV
Resident Evil 7
Tom Clancy Wildlands
Rocket League
Anthem