Plants vs. Zombies for PS Vita is the latest addition to PlayStation Plus subscribers' Instant Game Collections, a post on PlayStation Blog revealed this morning.

The casual strategy title joins other recent, complimentary titles in the company's rewards program, including Closure and Mega Man: Maverick Hunter X. Also new to subscribers this week is a large discount on Retro/Grade and its soundtrack, as well as sales for 13 PS Vita titles for the handheld's one-year anniversary, including Escape Plan, Hot Shots Golf: World Invitational and Sound Shapes. Smaller discounts will also be offered to non-Plus members.

For a full list of the games on sale this week, check out PlayStation Blog.