The Co-Op option in Wo Long requires players to set a password so that only their friends can join their online lobby. Next, players will be prompted to select a mission and, once up to two friends join the multiplayer Wo Long session, will load into the level together from the start.

Co-op. You can team up with a specific player to take on a battlefield together. Select Co-op from the Online Lobby in the Battle Flag menu to set out for a battlefield with another player. A host player in search of a co-op partner can either invite a friend or set a password that the guest must enter.