A September 20, 2026 post says Hideo Kojima has not decided whether PHYSINT will use the Decima engine, quoting him: “I really haven’t decided about the engine.” The quote also expresses enthusiasm about teaming up with Xbox. A separate post, citing an IGN interview, quotes Kojima saying a PlayStation release would be “a question for Xbox.” He describes an impression that Xbox wants its games to reach as many players as possible, but adds, “I really don’t know.”