Left 4 Dead 2 Missing from full Library??

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this Haruloha

Exists the possibility that you purchased the game with a different account. Let's try to find the account used to purchase this game

For this please go to your Microsoft account order history
https://account.microsoft.com/billing/orders

Once there, make sure to change the "3 months" filter and use instead "All available" next to "Ordered within"
Then start looking each item purchased with your account and see if you're able to find the game with order status "completed"

If you have more than one email please check the order history with each one

Still missing:

Fable 3

Left 4 Dead

Left 4 Dead 2

The Witcher 2: Assassins of Kings

combat shotgun from left 4 dead 2 oh i miss these games so much, still waiting for L4D3

Out of the 20 games that I originally had disappear, 12 of them have seem to come back. I'm still missing the following nine games however

Burnout: Revenge

Dante's Inferno

Dead or Alive 4

Fable 3

Gears of War 2

Left 4 Dead

Left 4 Dead 2

Sonic Unleashed

The Witcher 2

Thanks for the reply. It is backwards compatible its left 4 dead 2 and its in my purchas history. I have searched it in my system by pressing Y on the main screen its not there. I went to my apps and games full library and ready to download list its just
not there.