Fortnite data miner FortTory uncovered an unreleased limited-time mode in Fortnite's files that appears to mimic the "Infection" game mode from games like Halo and Call of Duty.
In "Infection," one team of human survivors tries to outlast a team of infected players. Infected players gain special powers but typically can't use guns, forcing them to resort to melee attacks. Each successful kill by an infected player infects the player they kill, causing them to switch teams.
The Fortnite LTM, titled "Arsenic," appears to give players several new abilities. Key words appearing in the files are "Double Jump," "Growl," and "Heal Over Time," each likely an ability bestowed on the infected players.
FortTory also highlighted quotes from the game files that refer to surviving the infected as a human, becoming infected and hunting down the humans.
Exact details of the game mode, including when it will go live, remain hazy.
Epic Games extended Fortnite Chapter 2 Season 2 on Tuesday, pushing the end date from April 30 to June 4.