Radio tag

In Red Faction: Guerrilla, radio tags are scattered across Mars' landscape. The tags are audio recordings, most of which were created about fifty years ago. They often tell parts of the game's background story; a radio tag in the Marauder City, for example, states that the Marauders are descendants of Ultor scientists. Radio Tags usually appear as glowing spheres or as skeletons, depending on the location. They appear on the radar as large green spots.