Meccano VR — Progression & Session Loop
- Session length +130%
- Perceived difficulty −18%
- Repeat intent 2×
Free-form building sandboxes stall out for casual users after 15 minutes. We needed a progression system that turned open-ended assembly into repeatable 20-minute sessions.
Introduced blueprint-driven mini-goals, a per-vehicle mastery track, and a toolbox unlock loop. Each core mechanic (thread nut, mount panel, wire chassis) maps to a beat in the session so users always know the next verb.
Median session length lifted from 12 → 28 minutes in internal tests. Day-2 return intent doubled in playtest surveys.