multiplayer, cooperative gameplay, Dying Light, parkour, zombie apocalypse, urban environment, night-time, flashlight, melee weapons, crafting, survival tactics, rooftop running, in-game chat, teamwork, strategy planning, PvE, join friends' session, invite to game, open-world exploration, safe houses, supply runs, combat skills, skill progression, dynamic weather, day-night cycle, horror atmosphere, intense action, first-person perspective, city of Harran, drop-in drop-out co-op, voice communication, challenges, side quests, resource management, skill trees, character customization, seamless multiplayer integration, cross-platform play, friends list, session matchmaking.