How to stop the vibration in my laptop while playing games

There are 3 possible cluprets for vibration in laptops
the fan the cd drive the hard drive
If your issue is coming from the fan assuming it's not damaged often there will be settings to adjust the fan speed as you lower this it will reduce the vibrations.
The cd drive would be your hardest to fix issue if you are using the cd to play the games. better drives do have less movement and possibly a usb connected drive tho bulky could be a solution for you.
A hard drive that vibrates enough to bother is very likely to go bad soon. If this is where the issue is replace as soon as possible. there are now solid state drives that have no vibration.