Vesper Defense Outpost (abbreviated as VDO) is a space station in the Alimbic Cluster, explored in Metroid Prime Hunters. It is the third or fourth place Samus visits, depending on whether she chooses to go to here or Arcterra after visiting Alinos.
Complete Map of the Vesper Defense Outpost: 
As the scan of the computer console in front of the landing platform in the VDO Gateway (shown below) says, the Vesper Defense Outpost was an Alimbic munitions dump which was kept at sub-zero temperatures to prevent reactivating fusion-powered weapons systems. Other, more powerful weapons were held in places like the Fuel Stack in shielded antigravity suspension beams.
In the absence of the Alimbics, however, many of the VDO's containment units lost structural integrity, leading to a perpetual coating of frozen weapons fuel around the station. As with all Alimbic areas visited by Samus in the Alimbic Cluster during Metroid Prime: Hunters, it has a number of cybernetic security devices (listed below) to guard it in the Alimbics' absence, as well as aliens who have infested the VDO.
- Alimbic Turret v1.4
- Psycho Bit v1.0
- Alimbic Turret v.2.7
- Voldrum (all types except Electro)
- Lesser Ithrak
- Psycho Bit v4.0
- Crash Pillar
Vesper Defense Outpost
Metroid Prime Hunters
VESPER DEFENSE OUTPOST is situated on the outer edge of ALIMBIC territory. Serving as a refueling station and munitions dump, subzero temperature is maintained to prevent overheating of fusion-powered weapons systems. Structural failure of fuel containers has resulted in a vast radioactive spill into space, leaving toxic and explosive fuel frozen to the sides of the structure.
"This small base once operated as a refuelling station. It has been abandoned for a long time. A toxic fuel leak has frozen over the station."
In Greek mythology, Hesperus (Greek Ἓσπερος Hesperos) (Roman equivalent: Vesper cf. "evening", "supper", "evening star", "west"), the Evening Star is the son of the dawn goddess Eos (Roman equivalent: Aurora) and brother of Eosphorus (Ηωσφόρος Eosphoros "dawn-bearer"; also Φωσφόρος Phosphorus, Lucifer "light-bearer", Iubar), the Morning Star. Hesperus' father was Cephalus, a mortal, while Eosphoros' was the star god Astraios.
- The VDO has many differences from the other territories in the Alimbic Cluster. It has the most countdowns, is the only territory to lack Energy Tanks (likely tying into its status as a munitions dump), the only territory to have two Alimbic Artifacts in the same room on two occasions, and the only one where the second visit yields no new upgrades for Samus.
- The VDO's story mode theme is named The Outpost in an unused file list. It is replaced by an eerier theme in the second half, titled Watching. The multiplayer theme of the VDO, Vesper Gateway, is heard once in the single player mode, in the Fuel Stack.
|Known Areas||Tetra Galaxy • Alimbic Cluster • Celestial Archives • Alinos • Vesper Defense Outpost • Arcterra|
|Characters||General Almiiak • Arctherus • Gorea|
|Creations||Psycho Bit • Voldrum • Alimbic Turret • Quadtroid • Crash Pillar • Oubliette • Octolith • Alimbic Artifact • Slench • Cretaphid • Stronghold Void (Portal) |
Alimbic Cannon • Omega Cannon • Universal Ammunition • Seal Sphere • Technology • Colored Panels
|Miscellaneous||Language • Tetra Border Wars • Hubs • Objects (Minor) • "Ultimate Power"|
|Planets visited in the Metroid series|
|Other locations visited in the Metroid series|
|Space Stations in the Metroid series|
|† denotes a destroyed station.|
|Metroid | Sidehopper Station|
|Celestial Archives | Vesper Defense Outpost | Oubliette† | Head Shot | Outer Reach|
|Cosmos region A47|
|SR388's solar system|
|Biologic Space Laboratories research station†|
|Ceres Space Colony† | Junk Quixote | Medical Space Station | The Locker|