PSP title Resistance Retribution has received a new age rating in Korea for PS5 and PS4 versions, meaning it could be included in PS Plus Premium in the near future. The Game Rating and Administration of Korea board issued the rating for Sony Bend's third-person shooter, as spotted by Gematsu.
The title now joins PS2 RPG Shadow Hearts as games with new ratings and trademarks that aren't yet part of PS Plus Premium. Or, at least, they're not part of the launch lineup in Asia. It's possible there could be variations between regions — we'll learn more once the selection of games for the US is shared. Just three PSP games are part of PS Plus Premium for now: Echochrome, Ridge Racer 2, and Super Stardust Portable. The full list of All PS Plus Games so far can be viewed through the link.
Released in March 2009 for PSP, Resistance Retribution was a third-person shooter set in between Resistance: Fall of Man and Resistance 2. It was fairly well-received at the time, with PS Vita title Resistance: Burning Skies being the significantly worse portable game. Do you want to play Resistance Retribution on PS5, PS4? Fight off the Chimera in the comments below.