Since the problem occurred after playing a video game, I suggest you update the Video drivers and some of the other drivers as well.
Installing drivers through Windows Update - Type Setting onto search box, click Update And Security, and select "Check for Updates". Install any available updates and restart your PC if required.
Run the Guide Me option in your Dell Product Support page. The tool will automatically detect driver updates (Chipset,Video) for your system. Please follow instructions to run Guide Me option in the link below.
Update 4: I'm returning this laptop, and will be receiving a replacement. It was simply too much hassle for me to deal with this problem.
It's very unfortunate you're still experiencing problems with the computer. I'm hoping your computer is fix or replace in the very near future, look forward to your next update.
Update 5: My replacement laptop has no battery problem, but it may have a problem with the speaker; with the volume at 100% or whenever the laptop receives a notification, it makes a 'sharp' sound.