Each character starts an episode with 3 action trackers, which they place in their play zone during setup (step 5). They are used to track spent actions. (Also see: Spending Actions.) All Action trackers are flipped to their unspent side during the encounter phase (step 6).
The NEON HOPE Base Game comes with additional (green) Action Trackers which you can use to track additional actions (or tasks). These tokens have no associated rules and only function as game aids.
