Here is the full list of PlayStation Plus December 2018 games for North America and Europe:
Iconoclasts (PlayStation 4, PlayStation Vita)
Onrush (PlayStation 4)
Papers, Please (PlayStation Vita)
Soma (PlayStation 4)
Steins;Gate (PlayStation 3)
Steredenn (PlayStation 3)
In addition to the new games, there is also a free bonus for Warframe PlayStation Plus players that can be claimed until January 15, 2019. It is called the PlayStation Plus Booster Pack III and provides people with a 7-Day Affinity Booster, a 7-Day Credit Booster, 100 Platinum, 100,000 Credits, the Quanta Corpus Laser Rifle, and the Quanta Obsidian Skin.
