The Dimetrodon is an ambient animal in Carnivores 2 and Carnivores: Dinosaur Hunter that wanders around the map eating insects and carrion. Originally thought to be incorrectly herbivorous, in Carnivores: Dinosaur Hunter, the in-game dinopedia reveals them to actually be eating animal matter as they move across the landscape. They are not a threat and can be killed in one shot from any weapon other than the pistol, which requires two shots to bring down. The Dimetrodon in the game bears more of a resemblance to its distant relative, the Edaphosaurus. In real life, Dimetrodon probably wouldn't have been as harmless as depicted in the game, as it was a ruthless predator of smaller pelycosaurs and would likely be more than capable of taking on the hunter.
In Carnivores: Dinosaur Hunter, the Dimetrodon's skin color was changed for unknown reasons. However, it is thought that it has to do with the visual appeal of the original skin not being up to par. The Dimetrodon had its old skin color restored in a recent update to the game.
Unlike other ambient animals, Dimetrodon needs to be shot twice by a pistol to kill it.