"Fortnite" maker Epic Games has prevailed in its high-profile antitrust trial over Alphabet’s Google, which alleged the Play app store operated as an illegal monopoly, in a ruling that if it holds could upend the entire app store economy. Jurors found for Epic on all counts, a court filing showed, after more than a month of trial in Epic’s lawsuit, which accused Google of taking action to quash competitors and charge unduly high fees of up to 30% to app developers. The court in January will begin work on what remedies to implement.