Dying Light 2 Stay Human will have the optional ability to play in a cooperative performance for up to four players. This probably means that the game will last you 1000 hours because the co-op is slower because you are always waiting for the one guy who gets lost somewhere.
Joke aside, Dying Light 2 promises a story in which we will have to make different decisions: who to side with, which move to pull, etc. And then the consequences of those decisions will be visible to the world. In order for players to agree among themselves which moves they want to take in key situations (without using voice chat), the game will offer a voting system so that all team members can decide on the desired decision. The main player (host) will be the one who will make the final decision, and it is up to him whether to respect the votes of other players or to act on his own.
Aside from this handy add-on, the good news is that players will be able to save all items from all sessions. For example, if they play co-op and continue solo, they will be able to use everything they picked up in the middle of cooperative playing, and vice versa.
Techland also emphasizes that the game will be fully cooperative. This was not the case with the first part, which was a co-op game most of the time, but the finale itself had to be experienced on its own.