Dying Light: Bad Blood is a multiplayer game set in the Dying Light universe. 

Bad Blood offers intense and dynamically changing online matches that creatively blend the distinction between PvP and PvE style of gameplay, while retaining the core of what made Dying Light an international success. Bad Blood is based on the following rules:

You and eleven other players are dropped into a zombie-infested area.

Each of you has the same goal - to evacuate as the only survivor. But to pay for your seat on the extraction chopper, you have to harvest blood samples from the infected. 

You need to scavenge for weapons, locate and destroy zombie hives and level up to make sure you can ‘harvest’ your way out of the quarantine zone.

Remember: only one can make it out alive.