Quick Answer
Letter scraps are too numerous for random wandering. After story completion, clear by city, coast, desert, and mountain zones, record each finished area, then complete the mystery follow-up.
Recommended Route
| Stage | What To Do | Watch Out |
|---|---|---|
| Prep | Use mobile vehicle and waypoint route | Avoid heavy cars in mountains |
| City | Check rooftops, alleys, and overpasses | Many are off main roads |
| Wild areas | Clear slopes, coast, and ruins slowly | Night visibility hurts |
| Cleanup | Recheck only uncertain zones | Do not rerun the whole map |
Key Checks
- Letter scraps and spaceship parts can share region loops.
- Helicopters save rooftop time.
- Remember the final mystery follow-up.