I managed to redeem these two.
Big thanks to you Bitsadmin, it's awfully nice :D

Thanks for Dark Deity: Complete Edition.

Serious Sam: Siberian Mayhem (Steam)

79Q0*-EWQKJ-7PQE*

Replace * with the key you press in Call of Duty: Advanced Warfare to "pay respects".

thanks

Random
DBA98-EB43F-B571D-3DFF3

Minecraft Legends (XBOX)

F32V7-GRDKG-GRH9V-T24FK-6XYFZ

For Xbox Series and Xbox One:

Press the Xbox button to open the guide, and then select "Store".
Press the View button to open the side menu, and then select "Redeem".
Enter the 25-character code, select "Next", and then follow the prompts.

For Windows PC:

Follow the link here.
Select "Redeem Code".
Enter the 25-character code, select "Next", and then follow the prompts.