This article or section contains information about StarCraft: Ghost, which has been declared non-canon. Elements may be taken as 'flavor lore' however. The content may be significantly out of date. Please do not add speculation to this article, and remember to cite a published source for details.
In multiplayer, infested marines were available as player units. They regenerated health and could explode, but their main weapons were claws and an "infested" gauss rifle which fired poisonous rounds of ammunition which dealt damage over time.
The infested marine cost two points in the Invasion game mode.
Infested marines are units nearly identical to the infested terran. They may be spawned by infested colonist huts at a time cost of 2. They are distinguished as infested marines in-game to distinguish them from their unarmed infested colonist counterparts.
The following section contains information from a previous version of StarCraft II which is no longer valid.
Infested marines were one of the last models to be updated for StarCraft II. It was juggled around frequently as the design team searched for the correct gameplay role for this unit. The appreciation for the unit was always very high and the development team intended for this unit to return to the game somehow.