PlayStation Plus members now have two new reasons to remain a member in good standing: Super Street Fighter IV: Arcade Edition and Rochard have both been added to the Instant Game Collection.
Pretty much everyone reading this should be familiar with the first game, but for those who are not, it's the most recent and essentially final version of the Capcom's flagship fighter.
As for the other game, that one might require some explanation: it's a platformer from Recoil Games that made its debut on the PlayStation Network last year (and has since appeared on both PC and Mac). It deals heavily with environmental puzzles, the kinds that you've probably seen in Portal, except everything is present in 2D.
Rochard was sleeper hit last year and is well worth the download. Both games also join Bioshock 2, which was added to Instant Game Collection catalogue last week. Remember, both titles are presented in their entirety and are totally free… provided you have a valid PlayStation Plus account (so they're not truly free games; it's more like you're renting them).