Etherium is a very rare resource, only harvestable in certain locations where Warp Space can solidify it.
Appearances[]
R-Type Command[]
A type of resource that crystallizes in warp space. Used mainly to upgrade and enhance units. Appears green to the human eye.
Much more rare than Solonium and Bydogen, fleets may need to deploy on missions solely to harvest Etherium to keep improving their craft.
R-Type Final 2[]
A resource needed for the production of R-craft, Etherium is earned by simply playing through stages. It can also be purchased in the in-game shop using currency also earned by playing through stages.