In a tweet, Techland explains just how much content is being crammed into Dying Light 2: Stay Human. Word is it will take 500 hours to complete every quest and side-quest in the action/RPG sequel: "To fully complete Dying Light 2 Stay Human, you'll need at least 500 hours—almost as long as it would take to walk from Warsaw to Madrid!" This recalls the famous song lyric: "I would walk 500 hours and I would walk 500 more, just to be the man who walked from Warsaw to Madrid and back." On the off chance that there are heathens out there who do not view this as positive news, a follow-up tweet explains you do not actually have to spend almost three full weeks in the game if you're not a completionist. A later tweet expands on that explanation:

500 hours is related to maxing out the game - finishing all the quests, endings, and exploring every part of the world, but a regular player should finish the story + side quests and do quite a lot of exploring in less than 100 hours, so don't worry!