Developer Techland has revealed an upcoming expansion for Dying Light, pitting players against one another with online multiplayer gameplay. Dying Light: Bad Blood has been designed to “blend PvP and PvE styles of gameplay,” according to its website, “while retaining the core of Dying Light’s unique experience.” Players with a PC can sign up for a free global playtest through Steam, and signups are open on the Dying Light website now.

“Our aim is both to satisfy players’ demands for competitive PvP gameplay and to explore new directions for Dying Light’s multiplayer experience,” said Tymon Smektala, Producer at Techland in a press release. “Since Bad Blood was inspired by fan requests, we want player feedback to be an integral part of our development. That’s why we’re inviting Dying Light fans to take part in our Global Playtest. They can play the expansion early and share their thoughts, knowing their feedback will have a major influence on Bad Blood‘s development.”

Bad Blood matches will have five players dropped into a zombie-infested area, with the goal of evacuating before nightfall. Players can loot for weapons and use their parkour abilities to navigate the city; evacuation can be bought by “harvesting blood samples from the infected.” Forming alliances can give players an edge when facing big bosses, but seats on the evacuation helicopters are limited, and players will be forced to backstab their fellows on the mission in order to gain enough samples and buy freedom. As Techland writes, “betrayal is not a question of ‘if’, but ‘when.'”

Bad Blood will be playable on the PC; other platforms have yet to be confirmed. Dying Light: Bad Blood is a standalone expansion – no base game required – and launches in 2018.