Tomorrow brings yet another refresh to the PlayStation Plus Instant Game Collection. King of Fighters 13 will be free to download for PlayStation Plus subscribers.

Released last year, KOF13 is the latest addition in SNK Playmore's long-running fighting franchise. A testament to its popularity, it was the second-most-watched game at EVO 2012.

As with other PlayStation Plus releases, while the game is free, DLC still requires payment. "Select" add-ons for the game will be discounted 50%, such as Mr. Karate.

In addition, Plus members will receive discounts on new PSN exclusive Derrick the Deathfin ($5.59) and Sega's The Revenge of Shinobi ($1.00).