Sentinel Prime

Sentinel Prime is the homeland of the Night Sentinels (or Argentians). It is not entirely clear if Sentinel Prime refers to their home planet, or their home dimension, or their home region. Sentinel Prime most likely means the same as Argent D'Nur, with the latter being the native name for Sentinel Prime as it is written in texts by the people themselves. Alternatively, Sentinel Prime may  be their homeland, evidenced by maps of the region titled "Sentinel Prime" showing a stretch of land with multiple cities.

Description
Sentinel Prime appears to have a cascadian landscape and all areas visited in-game appear to be within a subarctic temperate region, dominated by vast mountains and conifer forests. A single moon is visible in the sky, with a reddish surface colour not unlike Mars.