Re: my phone is getting hot what to do
Welcome to Android Central! What games are you playing? Devices can get pretty warm, depending on how processor-intensive a game is. Also, how is your cell reception? If you're accessing the web in a poor signal area, the phone might heat up as it works to maintain reception.
Do you have an SD card inserted? Corrupt cards can cause the phone to heat up, so try unmounting the card (in Settings>Storage) and remove it.