Where is the Missile Expansion in Arbor Chamber (Metroid Prime Origins)?

The Missile Expansion is in Arbor Chamber, Tallon Overworld. To get there you need Missile Expansion, Space Jump, Morph Ball, Morph Ball Bomb, Varia Suit, Charge Beam, Wave Beam, Boost Ball, Super Missile, Spider Ball, Ice Beam, Power Bomb Expansion, Grapple Beam, Plasma Beam first (starting a new game).

What you need first

Starting a new game from Landing Site, get these first, in this order, then go to Arbor Chamber (206 rooms in all):

1. Missile Expansion in Landing Site (0 rooms; needed for Missile Expansion (Missile))
2. Space Jump in Alcove (1 room; needed for Missile Expansion (Space Jump Boots))
3. Morph Ball in Ruined Shrine (10 rooms; needed for Missile Expansion (Morph Ball))
4. Morph Ball Bomb in Burn Dome (13 rooms; needed for Plasma Beam (Morph Ball Bomb))
5. Varia Suit in Sunchamber (10 rooms; needed for Plasma Beam (Varia Suit))
6. Charge Beam in Watery Hall (7 rooms; needed for Wave Beam (Charge Beam))
7. Wave Beam in Chapel of the Elders (27 rooms; needed for Ice Beam (Wave Beam))
8. Boost Ball in Phendrana Canyon (8 rooms; needed for Ice Beam (Boost Ball))
9. Super Missile in Observatory (10 rooms; needed for Spider Ball (Super Missile))
10. Spider Ball in Quarantine Cave (9 rooms; needed for Ice Beam (Spider Ball))
11. Ice Beam in Antechamber (39 rooms; needed for Plasma Beam (Ice Beam))
12. Power Bomb Expansion in Magma Pool (16 rooms; needed for Grapple Beam (Power Bomb))
13. Grapple Beam in Storage Depot B (32 rooms; needed for Plasma Beam (Grapple Beam))
14. Plasma Beam in Plasma Processing (15 rooms; needed for Missile Expansion (Plasma Beam))

Last stretch

From Plasma Processing, door by door:

1. Plasma Processing: go through the door to Geothermal Core → Geothermal Core (Plasma Door; needs Plasma Beam)
2. Geothermal Core: go through the door to North Core Tunnel → North Core Tunnel
3. North Core Tunnel: go through the door to Twin Fires → Twin Fires (Wave Door; needs Wave Beam)
4. Twin Fires: go through the door to Twin Fires Tunnel → Twin Fires Tunnel
5. Twin Fires Tunnel: go through the door to Transport to Tallon Overworld West → Transport to Tallon Overworld West
6. Transport to Tallon Overworld West: take the elevator → Transport to Magmoor Caverns East assumed
7. Transport to Magmoor Caverns East: go through the door to Transport Tunnel B → Transport Tunnel B
8. Transport Tunnel B: go through the door to Root Cave → Root Cave
9. Root Cave: go through the door to Arbor Chamber → Arbor Chamber (Plasma Door; needs Plasma Beam)

More Missile Expansions

• Missile Expansion (Burn Dome)
• Missile Expansion (Crossway)
• Missile Expansion (Dynamo)
• Missile Expansion (Dynamo)
• Missile Expansion (Furnace)
• Missile Expansion (Gathering Hall)
• Missile Expansion (Hive Totem)
• Missile Expansion (Main Plaza)
• Missile Expansion (Main Plaza)
• Missile Expansion (Main Plaza)
• Missile Expansion (Ruined Fountain)
• Missile Expansion (Ruined Gallery)
• Missile Expansion (Ruined Gallery)
• Missile Expansion (Ruined Nursery)
• Missile Expansion (Ruined Shrine)
• Missile Expansion (Ruined Shrine)
• Missile Expansion (Training Chamber Access)
• Missile Expansion (Vault)
• Missile Expansion (Watery Hall)
• Missile Expansion (Watery Hall Access)
• Missile Expansion (Fiery Shores)
• Missile Expansion (Storage Cavern)
• Missile Expansion (Triclops Pit)
• Missile Expansion (Elite Control Access)
• Missile Expansion (Elite Research)
• Missile Expansion (Fungal Hall Access)
• Missile Expansion (Fungal Hall B)
• Missile Expansion (Main Quarry)
• Missile Expansion (Metroid Quarantine A)
• Missile Expansion (Metroid Quarantine B)
• Missile Expansion (Phazon Processing Center)
• Missile Expansion (Security Access A)
• Missile Expansion (Frost Cave)
• Missile Expansion (Gravity Chamber)
• Missile Expansion (Ice Ruins East)
• Missile Expansion (Ice Ruins East)
• Missile Expansion (Phendrana Shorelines)
• Missile Expansion (Phendrana Shorelines)
• Missile Expansion (Quarantine Monitor)
• Missile Expansion (Research Lab Aether)