I briefly checked the product description for you and copied it out for you:

Game included
Buy a selected Intel processor and get Marvel Avengers for free.

If you buy a selected Intel CPU between 28.08.2020 and 28.02.2021, you will receive the game Marvel Avengers for free. The promotion is valid while stocks last.

CODE REDEMPTION DEADLINE: 28.02.2021

Redemption process:

1. purchase one of the selected CPU's in the above mentioned period. 2.
You will receive your code from us on the dates listed below. 3.
3. create an account or log in at the following link: https://softwareoffer.intel.com/MarvelsAve... (Verification via mobile phone or email can take up to 24 hours).
After successful verification, you will be taken to your Intel dashboard. 5.
On the dashboard, select Redeem your Master Key and follow the instructions.

Code's:

We will not have an unlimited number of codes, so this offer is only valid while stocks last.

If you have any questions or issues with the codes, please contact Intel Customer Service directly.
This requires:

-Your master key (code received from us).
-Invoice/receipt of the processor

Contact us directly at:

https://softwareoffer.intel.com/support

Shipping dates of the codes (while stocks last):

Ordered up to and including 07.10., dispatch on 08.10.
Ordered up to and including 09.11., dispatch on 10.11.
Ordered up to and including 09.12., dispatch on 10.12.
Ordered up to and including 11.01., dispatch on 12.01.
Ordered up to and including 28.02., dispatch on 01.03.
Details
URL https://softwareoffer.intel.com/MarvelsAve...
Valid from 28.08.2020
Valid until 01.03.2021
Deadline 01.04.2021

How to get the code I don't have one either