Hi 8gigLiam,
Thanks for reaching Microsoft Surface Community. We thank you for taking advantage on our new Surface Laptop 3. Definitely this is not the experience that we want you to have. We do have some few questions to have this isolated and some suggestions could lead us to a resolution.
When your on Battery, you have mentioned that you the fan is not that loud, But if you check on the battery slider are you on "Best Performance" while your in game?
You can adjust how you want your CPU to perform, by selecting the battery icon on the task bar and adjusting the power mode. Setting the power mode to Recommended throttles the CPU and helps keep it running cooler with less need of assisted cooling. While a setting of Better performance or Best performance will allow the device to run more quickly, it will also allow the fan to come on more often to keep the CPU cool and performing it's best.
Is this the 15" or the 13.5" Surface Laptop 3 for the Graphics"
If this is the 13.5" what's the processor?
We have :
Quad-core 10th Gen Intel® Core™ i5-1035G7 Processor
Quad-core 10th Gen Intel® Core™ i7-1065G7 Processor
You can check this by going to Task Bar search box and Type there "dxdiag".
Looking forward on your response. Please keep us posted.
Regards,
Edd