The Radiant is a faction in Dota 2 that revolves around light, heat and life. Most of the heroes from the faction are seen as protectors and champions of good. The Radiant is in conflict with the Dire.
The faction is located in the bottom left corner of the map. It's side of the map is full of life: grassy land, blooming trees and stone structures dominate the scenery.
In Dota Allstars, the Radiant is named the Sentinel. Their features are very similar in terms of aesthetics and heroes that belong to them.