Summon Night 6: Lost Borders (サモンナイト６ 失われた境界たち) is a tactical role-playing game for the PlayStation Vita and PlayStation 4 video game consoles. The game was released in Japan on March 10, 2016 by Bandai Namco Entertainment. An English localized version was released in North America both physically and digitally on October 31, 2017 and in Europe as a digital-only release on November 15, 2017 by publisher Gaijinworks. While this is the sixth numbered entry in the mainline series, it is only the second one to be translated into English, after 2015's release of Summon Night 5, also by Gaijinworks.
NOTE: On January 7, 2022, the PS4 digital version of the game has been removed from the PlayStation Stores in North America, Europe and Australia for unknown reasons.
Source: Wikipedia, "Summon Night 6", available under the CC-BY-SA License.