Macbooks Heating While Playing Game

Yes, you're overthinking. Your computer won't explode.

It's normal for any computer to heat up when the processors are being pushed harder than normal as may easily be the case when playing games.

When pushing the computer hard, take care not to block air vents.

Follow the guidance that Apple gives here: Keep your Mac laptop within acceptable operating temperatures - Apple Support

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We want to make sure you reach the right team for help with your device. We recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: Get Support.