since you have 4.2.2 this thread discusses issue with that update.
if you are seeing this across virtually ANY game you are playing, its possible the phone is just not designed for the games you are playing.
things you can do on your on to troubleshoot:
1. factory reset and install one game and see if it behaves better
2. cast a wider net and try games from other devs that have different hardware requirements.
3. email the dev of the apps in question and ask if their games are fully compatible with the phone
4. head to a game app forum that discusses those games and ask others who use those games
5. root and install a custom rom that handles gaming better
6. return the phone.
Originally Posted by DMXXX
...I just got the phone and I have no experience with 4.1.2.