The secondary attack of a unit is the weapon it uses mainly to do area-impact damage, to destroy heavy machinery or heroes, or to aid or hurt nearby allies or enemies, respectively. For regular infantry, this is usually an explosive device, such as thermal detonators or detpacks. For a hero, it is usually a saber throw or some Force power. The secondary attack is used by right-clicking the mouse for the computer game and hitting the left trigger on the controller for the consol game. The current secondary attack being used is displayed directly above the player's primary attack icon.

Some common secondary attacks include: