's DLC,, is an essential add-on for any fan of the base game. While the unpredictable spy-thriller story is among the best to be developed by CD Projekt RED, Phantom Liberty pays homage to a number of CD Projekt RED's previous games and most popular franchises — none more so than their critically and commercially revered series based on Andrzej Sapkowski's fantasy series of book, series. One particularly well-hidden reference, made in, to a notable character from franchise will undeniably be very bittersweet for long-time fans.