The grenade trooper, alternatively referred to as a thermal detonator trooper, functioned as an artillery squad within the ranks of the Galactic Empire. These troopers utilized a mortar-like apparatus to launch thermal detonators toward targeted zones. While highly efficient when engaging armored vehicles and units with shields, they proved less successful when facing structures and non-mechanized adversaries. Their attire consisted of black uniforms complemented by a helmet.
Throughout the Galactic Civil War, Grenade Troopers saw action across numerous battlegrounds. Notably, a minimum of four of these troopers played a supporting role for the Empire during the Occupation of Bespin.
Darth Vader gave the command to enlist more troopers from troop centers during the conflict, intending to deploy them against the Rebel Alliance in combat.
In the 2001 video game Star Wars: Galactic Battlegrounds and its 2002 expansion pack, Imperial Thermal Detonator Troopers represent the Galactic Empire's artillery force. The game provides them to the player in several missions during the Galactic Empire campaign. Furthermore, additional troopers can be constructed at troop centers, requiring 90 units of food and 40 units of nova crystals.