Welcome to the community, @subhan. 
Ooh, Games Testing is such an interesting topic!
Is this masterclass video on your radar? Dealing with Device Fragmentation in Mobile Games Testing with Ru Cindrea
I also found some useful threads on this Club:
- Resources For Games Testing
- Mobile Game Testing: Industry Leaders’ Challenges and Strategies
- Game testing automation
Hope you’re able to find something of use. Enjoy exploring. 