Causes, consequences and prediction

Buttons and indicators control a passage stateButton in the active stateIndicator shows the condition result
PortalButtons and indicators control a passage state
  1. Button in the active state
  2. Indicator shows the condition result
© Valve · Source ↗

Players predict an action’s result, test it and refine their understanding of the causal relationship.

Design tips

  • Let players repeat an action and compare its consequences.

Examples