VR combat simulations in the HIA Club grant Inter-Knot XP, but you need to be mindful of battery charges
All activities in the HDD, as well as the side quests that you tackle, grant Inter-Knot XP. Think of this as akin to “World Level” or a means of overall progression.
However, there will be moments when you feel that you’ve already done everything, yet you still lack XP. If this is the case, then you need to head to the Hollow Investigation Association or the HIA Club. The VR simulations in the HIA Club allow you to select from different combat challenges. These allow you to farm for materials, such as Investigator Logs (character XP), W-Engine components (W-Engine leveling), and Plating Agents (Drive Disc leveling). Moreover, completing these runs nets you Inter-Knot XP, too.
However, be forewarned that farming for materials in Zenless Zone Zero also depletes your energy meter. While energy points are restored gradually, it will likely take hours for the meter to be filled up. To alleviate this, you can buy coffee from the Coff Cafe on Sixth Street. Alternatively, you can spend Ether Batteries or Polychrome to restore +60 energy.
