Beginning August 30th, for a limited time Sony's PlayStation Plus Double Discounts Promotion comes to PlayStation Store featuring great deals with savings on a variety of PSN titles. 
Here's further details from PlayStation Digital Promotions Specialist Zack Garvey via PlayStation Blog, to quote:
The PlayStation Plus Double Discounts promotion comes to PlayStation Store on August 30, bringing with it not only price reductions of up to 35% across a number of different titles, but up to 70% off those games if you’re a PlayStation Plus member for a limited time.
The PlayStation Plus Double Discounts promotion runs from 00.00 am local time on August 30 to 23.59 pm local time on September 13.
Here's further details from PlayStation Digital Promotions Specialist Zack Garvey via PlayStation Blog, to quote:
The PlayStation Plus Double Discounts promotion comes to PlayStation Store on August 30, bringing with it not only price reductions of up to 35% across a number of different titles, but up to 70% off those games if you’re a PlayStation Plus member for a limited time.
The PlayStation Plus Double Discounts promotion runs from 00.00 am local time on August 30 to 23.59 pm local time on September 13.
