Try your hand at online quest where the player will explore the urban slums in search of different things. List compiled and posted them in the top left corner. Silence and neglect terrain a little depressing, but gradually captures the excitement of HOS. Use parkour to achieve the goal, look into every nook and piles of guessing, why all this is necessary at all. What is an urban legend got lost among the abandoned houses.
WASD - move, Space - jump