Groth Island 100% Exploration Guide — All Collectibles & Hidden Content

Groth Island is the wilderness area surrounding Hethereau, featuring natural landscapes, hidden caves, and field bosses.

• Total exploration items: ~150+
• Main collectibles: Oracle Stones, Chameleon Packages, Safes
• Teleport points: 10
• Hidden caves: 5
• Field bosses: 3

Phase 1: Coastline (~1 hour)

1. 1Start from the dock, go counterclockwise along the coast
2. 2Collect all visible items along the shore
3. 3Unlock coastal teleport points
4. 4Watch for hidden cave entrances by the sea

Phase 2: Inland Forest (~1.5 hours)

1. 1Enter the central forest area
2. 2Collectibles are scattered — search carefully
3. 3Check trees and caves for chests
4. 4Some areas require elemental puzzles to access

Phase 3: Mountain/Highlands (~1 hour)

1. 1Climb the central mountain peak
2. 2Multiple high-tier chests at the summit
3. 3Hidden Oracle Stones along the ridge
4. 4Glide to hard-to-reach positions from the peak

Phase 4: Hidden Areas (~30 min)

1. 1Find all 5 hidden cave entrances
2. 2Some caves contain independent puzzle challenges
3. 3Deep cave chests offer generous rewards

Oracle Stones (8)

Distributed across coast, forest, and mountain areas. Use the interactive map to mark each one.

Hidden Cave Entrances (5)

1. 1North cliff base
2. 2Behind eastern waterfall
3. 3Central great tree roots
4. 4Southwest beach rock crevice
5. 5Mountain summit crater edge

Boss 1: Coast Guardian (Lv.35)

• Weakness: Ice
• Recommended level: 40+
• Drops: Advanced materials and weapon upgrade materials

Boss 2: Forest Behemoth (Lv.40)

• Weakness: Fire
• Recommended level: 45+
• Drops: Rare disks and character ascension materials

Boss 3: Mountain Overlord (Lv.45)

• Weakness: Lightning
• Recommended level: 50+
• Drops: Legendary arc upgrade materials

Groth Island exploration takes about 3-4 hours. Compared to Hethereau, collectibles are more scattered but the environment is more open. Use vehicles and gliders for efficient traversal.