Subchamber One

Subchamber One is a room in the Impact Crater on Tallon IV in Metroid Prime, and is where Samus first battles Metroid Prime's exoskeleton form. Once the creature has been sufficiently damaged, it will create a hole in the ground and fall down to Subchamber Two, where the battle continues. While within this chamber, Metroid Prime will only switch to the colors of the Wave Beam and the Power Beam, one after another.

Connecting rooms[]

Phazon Infusion Chamber (via one-way entrance)
Subchamber Two (via one-way exit via hole in the ground)

Inhabitants[]

Samus looks down at Metroid Prime from the Phazon Infusion Chamber. This screenshot was presumably taken while the game was still in development, as a cutscene is triggered in the final game before the player can reach the edge of the hole.

Metroid Prime

Rooms in Metroid Prime
Frigate Orpheon	Exterior Docking Hangar • Main Docking Bay • Air Lock • Deck Alpha Access Hall • Emergency Evacuation Area • Deck Alpha Umbilical Hall • Map Facility • Connection Elevator to Deck Beta • Deck Beta Conduit Hall • Biotech Research Area 1 • Deck Beta Security Hall • Biohazard Containment • Deck Beta Transit Hall • Cargo Freight Lift to Deck Gamma • Reactor Core Entrance Save Station • Reactor Core Deck Gamma Monitor Hall • Connection Elevator to Deck Beta • Subventilation Shaft Section A • Subventilation Shaft Section B • Main Ventilation Shaft Section A • Main Ventilation Shaft Section B • Main Ventilation Shaft Section C • Main Ventilation Shaft Section D • Main Ventilation Shaft Section E • Main Ventilation Shaft Section F • Biotech Research Area 2 • Connection Elevator to Deck Alpha • Deck Alpha Mech Shaft
Tallon Overworld	Landing Site • Canyon Cavern • Tallon Canyon • Transport Tunnel A • Transport to Chozo Ruins West • Root Tunnel • Root Cave • Arbor Chamber • Transport Tunnel B • Transport to Magmoor Caverns East • Gully • Alcove • Waterfall Cavern Temple Hall • Temple Security Station • Temple Lobby • Artifact Temple Frigate Crash Site • Overgrown Cavern • Transport Tunnel C • Transport to Chozo Ruins East • Frigate Access Tunnel • Main Ventilation Shaft Section C • Main Ventilation Shaft Section B • Main Ventilation Shaft Section A • Reactor Core • Reactor Access • Save Station • Cargo Freight Lift to Deck Gamma • Deck Beta Transit Hall • Biohazard Containment • Deck Beta Security Hall • Biotech Research Area 1 • Deck Beta Conduit Hall • Connection Elevator to Deck Beta • Hydro Access Tunnel Great Tree Hall • Great Tree Chamber • Transport to Chozo Ruins South • Transport Tunnel D • Transport Tunnel E • Transport to Phazon Mines East • Life Grove Tunnel • Life Grove
Chozo Ruins	Transport to Tallon Overworld North • Ruins Entrance • Main Plaza • Nursery Access • Eyon Tunnel • Ruined Nursery • Save Station 1 • North Atrium • Ruined Gallery • Map Station • Totem Access • Hive Totem • Transport Access North • Transport to Magmoor Caverns North • Vault Access • Vault • Plaza Access • Ruined Shrine Access • Ruined Shrine • Tower of Light Access •Tower of Light • Tower Chamber • Ruined Fountain Access • Ruined Fountain • Meditation Fountain • Magma Pool • Training Chamber Access • Training Chamber • Piston Tunnel • Arboretum Access • Sunchamber Lobby • Sunchamber Access • Sunchamber • Sun Tower Access • Sun Tower Arboretum • Gathering Hall Access • Gathering Hall • Save Station 2 • Watery Hall Access • Watery Hall • Dynamo Access • Dynamo • East Atrium • Energy Core Access • Energy Core • Burn Dome Access • Burn Dome • West Furnace Access Furnace • East Furnace Access • Crossway Access West • Crossway • Crossway Access South • Elder Hall Access • Hall of the Elders • Elder Chamber • Reflecting Pool Access • Reflecting Pool • Antechamber • Save Station 3 • Transport to Tallon Overworld East • Transport Access South • Transport to Tallon Overworld South
Magmoor Caverns	Transport to Chozo Ruins North • Burning Trail • Save Station Magmoor A • Lake Tunnel • Lava Lake • Pit Tunnel • Triclops Pit • Storage Cavern • Monitor Tunnel • Monitor Station • Transport Tunnel A • Transport to Phendrana Drifts North • Warrior Shrine • Shore Tunnel • Fiery Shores • Transport Tunnel B • Transport to Tallon Overworld West Twin Fires Tunnel • Twin Fires • North Core Tunnel • Geothermal Core • Plasma Processing • South Core Tunnel • Magmoor Workstation • Workstation Tunnel • Transport Tunnel C • Transport to Phendrana Drifts South • Save Station Magmoor B • Transport to Phazon Mines West
Phendrana Drifts	Transport to Magmoor Caverns West • Shoreline Entrance • Phendrana Shorelines • Save Station B • Ice Ruins Access • Ice Ruins East • Plaza Walkway • Ruins Entryway • Ice Ruins West • Canyon Entryway • Phendrana Canyon • Temple Entryway • Chozo Ice Temple • Chapel Tunnel • Chapel of the Elders Courtyard Entryway • Ruined Courtyard • Save Station A • Specimen Storage • Research Entrance • Map Station • Hydra Lab Entryway • Research Lab Hydra • Observatory Access • Observatory • Save Station D • West Tower Entrance • West Tower • Control Tower • East Tower • Aether Lab Entryway • Research Lab Aether • Research Core Access • Research Core • Quarantine Access • North Quarantine Tunnel • Quarantine Cave • Quarantine Monitor • South Quarantine Tunnel • Transport to Magmoor Caverns South Transport Access • Frozen Pike • Pike Access • Frost Cave Access • Frost Cave • Save Station C • Upper Edge Tunnel • Phendrana's Edge • Storage Cave • Security Cave • Lower Edge Tunnel • Hunter Cave • Lake Tunnel • Gravity Chamber • Chamber Access • Hunter Cave Access
Phazon Mines	Transport to Tallon Overworld South • Quarry Access • Main Quarry • Save Station Mines A • Security Access A • Mine Security Station • Security Access B • Storage Depot A • Elite Research • Research Access • Ore Processing • Elevator Access A • Elevator A • Storage Depot B • Waste Disposal Elite Control Access • Elite Control • Maintenance Tunnel • Ventilation Shaft • Control Room • Omega Research • Map Station Mines • Dynamo Access • Central Dynamo • Save Station Mines B • Quarantine Access A • Metroid Quarantine A • Elevator Access B • Elevator B Fungal Hall Access • Fungal Hall A • Phazon Mining Tunnel • Fungal Hall B • Missile Station Mines • Quarantine Access B • Metroid Quarantine B • Save Station Mines C • Elite Quarters Access • Elite Quarters • Processing Center Access • Phazon Processing Center • Transport Access • Transport to Magmoor Caverns South
Impact Crater	Crater Entry Point • Crater Tunnel A • Phazon Core • Crater Missile Station • Crater Tunnel B • Phazon Infusion Chamber • Subchamber One • Subchamber Two • Subchamber Three • Subchamber Four • Subchamber Five • Metroid Prime Lair
Unused	Engine Room • Reactor Room

Boss Rooms
Metroid	Kraid's room • Ridley's room • Zebesian Command Center
Metroid: Zero Mission	Corridor No. 5 • Corridor No. 4† • "Acid Worm's room" • Kraid's room • "Kiru Giru's room" Imago's hideout • Ridley's room • Zebesian Command Center • Top of the ruins • Ship's last chamber
Metroid Prime	Reactor Core • Hive Totem • Ruined Shrine • Burn Dome • Sunchamber • Chapel of the Elders Quarantine Cave • Elite Control • Central Dynamo • Elite Research • Elite Quarters • Artifact Temple Subchambers (1, 2, 3, 4) • Metroid Prime Lair
Metroid Prime Hunters	Data Shrine 03 • Biodefense Chamber A • High Ground • Biodefense Chamber B Echo Hall • Weapons Complex • Sic Transit • Council Chamber • Fault Line • "Seal Sphere chamber" • "Gorea's lair"
Metroid Prime 2: Echoes	Temple Sanctuary • Agon Temple • Judgment Pit • Main Reactor • Dark Agon Temple • Hive Chamber A Dark Torvus Arena • Main Hydrochamber • Sacrificial Chamber • Dark Torvus Temple • Dynamo Works Main Research • Undertemple • Aerie Access • Aerie • Hive Temple • Sanctum • Sky Temple Gateway
Metroid Prime 3: Corruption	Docking Bay 5 • Generator Shaft • Temple of Bryyo • Jousting Field • Bryyo Leviathan Core Steambot Barracks • Ballista Storage • Main Docking Bay • Turbine Chamber • Elysian Leviathan Core Proving Grounds • Metroid Creche • Generator B • Aurora Chamber • Main Cavern Transit Station Leviathan • Pirate Homeworld Leviathan Core • Sanctum
Metroid II: Return of Samus	Arena area of Chozo base • Arachnus' room • Alpha Metroid chamber • Alpha's chamber Second tower corridor • Zeta's chamber • Final Omega's chamber • Queen's nest
Metroid: Samus Returns	Arena area of Chozo base • Arachnus' room • Alpha Metroid chamber • Alpha's chamber "Octroll Lake"† • Zeta's chamber • Final Omega's chamber • "Diggernaut arena" Queen's nest • "Landing Site"
Super Metroid	"Ceres confrontation room" • "Torizo's chamber" • "Spore Spawn Room" • Kraid's chamber Croc's pit • Phantoon's chamber • "Botwoon's chamber" • Draygon's chamber Golden Torizo's chamber • Ridley's chamber • "Big Metroid's room" • Zebesian Command Center
Metroid: Other M	BOTTLE SHIP Control Room • Subterranean Control Room • Biological Experiment Floor Biosphere Test Area • Crater Interior • Experiment Floor • Materials Storehouse Materials Transfer Lift • "Rhedogian room" • Blast Furnace Observation • "Sand Tower summit" Geothermal Power Plant • "Confrontation room" • Nightmare's Room • Room MW • Control room Control Bridge
Metroid Fusion	"Arachnus' chamber" • "Elephant Bird's room" • "Zazabi's room" • "Serris arena" "B.O.X.'s room" (PYR/NOC) • "Nocturnal cavern" • Main Boiler Control room • "Yakuza's room" Giant root's arena • Electronic junkyard • "Neo-Ridley's room" • Operations Deck • Docking Bays
Metroid Dread	"Central Unit room" (x5) • "Corpius' room" • "Kraid's room" • "Quiet Robe's chamber" • "Drogyga's domain" "Escue's gazebo" • "Grand concourse" • "Ferenia E.M.M.I. confrontation room" • "Golzuna's lair" "Hall of Judgment" • "Elite chamber" • "Mawkin throne room" • "Crash Site"
† means this room only contains a boss under specific circumstances.