Sith Stalker Armor was a type of armor that was cybernetically grafted to the wearer, covering the entire body except the arms. Featuring design details resembling those found on Mandalorian and Ubese armor, Sith stalker armor presented a foreboding and grisly countenance. Historically, this type of armor was favored by vicious Sith assassins who were highly feared within the ranks of both the Sith and the Jedi.

In the dark side ending of Star Wars: The Force Unleashed, Galen Marek was grievously wounded by Emperor Palpatine but was salvaged with his body reconstructed similar to how Darth Vader was when he became the Emperor’s Sith apprentice.

There are six lightsabers on Marek’s belt in this costume: his new Sith lightsaber, which features a set of three spiked blade guards; his original lightsaber that he built under Vader’s tutelage; Rahm Kota‘s lightsaber, which also served as Marek’s second; one half of the lightsaber that previously belonged to Darth Maul; Darth Vader’s lightsaber; and the top portion of Kazdan Paratus‘ dual bladed lightsaber staff (dual blades are only in the Wii and DS versions).

Once completing the game and choosing the dark side ending, players have the option of playing again and wearing the Sith Stalker Armor. Modified versions of it are featured in the Ultimate Sith Edition version of the game. During the Tatooine mission, the player wears a set dubbed the «Desert Survival Gear», which includes Tusken Raider garb worn over the armor itself. In the Hoth mission, a variant referred to as the «Dark Lord’s Armor» is featured. The description stub stated that it was largely inspired by Vader’s armor, and it included many modifications from the standard Sith Stalker Armor. The original skin-tight leather body suit and the ribbed abdominal plates are replaced by a full body-suit made of the same quilted material as the one featured on Vader’s armor, along with similar looking pectoral armor. The hands are gloved and the helmet has an outwards slanting metal plate attached that protects the rear and sides of the neck, and mimics the silhouette of Vader’s helmet.