The Outback Hunter is a special type of hellion used in Left 2 Die. When the player researches hellions, two Outback Hunters arrive in drop pods as well.
Notes
The Outback Hunter may have been named after the Outback Hunters, a mercenary group present in older versions of StarCraft II.
References
Blizzard Entertainment. StarCraft II. (Activision Blizzard) Map: Left 2 Die (in English). 2011.