Agree with most of the choices but really, Halo? I feel like the only people who would revere Halo in 50 years would have long moved on to Modern Warfare 48 and forgotten about Combat Evolved. You know what will still be talked about though? World Of Warcraft.
There are definitely more, but I can't disagree with any of these.
This is a solid list. Not a single choice I disagree with.
So nothing in the last 9 years would make the cut? I would definitely put in Gears of War, World of Warcraft and Portal.
I think your list is spot on, these are all standard setting games that changed the industry. Maybe Doom or Wolfenstein 3D should go on there as well.