The MEC class included clone commandos, Galactic Marines and clone paratroopers. All of the variants included in the MEC class were some of the most well-trained fighting units in the Grand Army of the Republic.
MEC troopers have appeared in both Star Wars Battlefront: Renegade Squadron and Star Wars Battlefront: Elite Squadron, where the customization feature allows the player to create a clone trooper with an exaggeratedly large body named a MEC trooper. With this body, the player is given three options for the head, clone commander Bacara's helmet, a clone paratrooper's helmet, or a clone commando's helmet. No other information is given for this type of clone trooper, including what the acronym "MEC" stands for.
The MEC Trooper's torso armor closely resembles that of Dash Rendar.