PlayStation Plus members will be able to grab Metro: Last Light for 20 percent off ($47.99) and the Grid 2 pre-order at a 10 percent discount ($53.99) starting this week, according to a post on the PlayStation Blog.
Following the update, cross-buy platform adventure game Knytt Underground will also be added to the Instant Game Collection. PlayStation Plus members will be able to pick it up for free, while regular PSN members can grab it for $14.99.
Darksiders and Tekken 6, meanwhile, will no longer be available through the Instant Game Collection as of May 21. Darksiders joined the Instant Game Collection in Janurary of this year, while Tekken 6 became available in March.
Check out the full details for this week's PlayStation Store update here.