The Oneplus X has a Snapdragon 801 and is the flagship processor of 2014. It might look as though it is a gaming phone, but it sure is. Since it is just for 15,000; it is quite the value for money. It is of course not as good as the phones having Snapdragon 820, but it the best one in its price range.
Oneplus X has a 5.1-inch screen and it might not be big, but offers a very clear view for the gamers. Overall, under a 20,000 phone list; the Oneplus X might be one of the best gaming phones.
Samsung Galaxy S6 edge+
The S6 plus edge comes with a screen of 5.7 inches. It has super AMOLED display running panel, which is of the same resolution and PPI of 518. It is not as good as the S6 edge in gaming, but you won’t be able to see the difference with your naked eye. The S6 plus edge comes with 4GB RAM and hence offers a great gaming experience. The 3000mAH battery also serves the purpose and gives a long gaming experience.