Dark Souls, released by FromSoftware in 2011, built its online play around summon signs left on the ground. Activating a sign summons a phantom player for co-op help or, with certain signs, for PvP, and the short chime marks that successful connection. The sound stayed iconic through later Souls games and was clipped for soundboards and edits, where fans use it as shorthand for help arriving. Its brevity and distinctive bell tone keep it usable far outside boss fights and invasion clips.