Lexicon Wars is a Cassette in Deathloop.
Location
Found in Akkar Station in Karl's Bay, available after interacting with a Visitor. It is dropped to the floor, and remains there. On next visits to Akkar Station it will be on the panel near the microphone.
Transcript
Lila: What are you doing?
Colt: Recording this. For posterity.
Lila: You beating me at Lexicon?
Colt: It's happened before.
Lila: So show me what you've got!
Colt: I. Got. This. Game!
Lila: Oh. Wow. Okay. I'll admit. I'm impressed.
Colt: I'm very impressive.
Colt: Who's the word king?
Lila: Is that your RAK password? It's supposed to be a secret!
Colt: Who's the word king?
Lila: You're the word king.
Colt: Louder. For the record.
Lila: I bow to you, oh mighty Word King Colt!
Colt Note
Decades ago, you played your RAK password in a word game with Lila. Total genius move, Colt.