Star Wars: Republic Commando

The game features some gameplay elements that resemble features in other first-person shooters. The heads-up display (HUD) shows the player character's helmet, with a tactical visor. The player acts as squad leader of a squad of four elite troops. The squadmate order system allows the player general tactical control over the three non-player characters (NPCs) squadmates that round out the four-man commando team.

Many objects in the game environment will highlight when the crosshair is placed over them. The player can then press the "use" key to issue an order automatically associated with the object; for example, a sealed door may highlight with a synchronized team breach-and-clear command, or a computer console might have a "slice" (computer hacking) command, while a pile of cargo boxes suitable for a cover position with good vantage may provide a "take up Sniper/Anti-Armor position" command. Where possible, the squadmates will usually take their preferred roles (sniper, demolitions and technical). The player can order the squad to move to secure any position (wherever the crosshair is pointed), or perform search-and-destroy.

The game begins with a montage detailing Delta Squad's creation, early life, and training at the cloning facilities on Kamino. At the onset of the Clone Wars, the four members of the squad—Delta-38, 62, 40, and 07 ("Boss", "Scorch", "Fixer", and "Sev", respectively)—are deployed during the Battle of Geonosis and tasked with assassinating Sun Fac, the chief lieutenant of Geonosian Archduke and Separatist Council member Poggle the Lesser. Upon successfully terminating their target, Delta Squad is retasked to several other objectives that were originally assigned to other Clone Commando teams that have been lost to enemy ambushes. The squad proceeds to sabotage a battle droid factory located underneath Sun Fac's headquarters, disable a major anti-aircraft bunker that is wreaking havoc on the Republic Army's air forces, and sneak onto a disabled Separatist Trade Federation Lucrehulk-class Core Ship to sabotage it and steal important launch codes that will be used to prevent a significant portion of the Separatist fleet from retreating. The squad narrowly escapes the Core Ship moments before it is destroyed.

A year into the war, the now-veteran Delta Squad is sent to investigate the derelict Acclamator-class Republic Assault Ship (RAS) Prosecutor. Delta Squad splits up to investigate, quickly losing contact with command as they board the ship due to unexplained communication jamming. Making their way inside, they find the Prosecutor seemingly abandoned and in disrepair. The squad lose contact with Scorch after he reports electrical interference with his visor and Boss is soon ambushed by scavenger droids.

Star Wars: Republic Commando received "generally favorable" reviews, according to review aggregator Metacritic.

In the United Kingdom, sales of Republic Commando's Xbox version surpassed 60,000 copies by the end of 2005. In France, 85,000 units were shipped for the game's launch.

In April 2014, following The Walt Disney Company's acquisition of Lucasfilm, most of the licensed Star Wars novels, comics, and video games produced since the originating 1977 film were rebranded as Star Wars Legends and declared non-canon to the franchise going forward. Republic Commando was among the projects affected by this, as the events depicted in its campaign would no longer be considered canon. However, the game's characters remained canon thanks to Delta Squad's inclusion in "Witches of the Mist", an episode from the third season of the 2008 animated series Star Wars: The Clone Wars (whose canonicity remained intact after the acquisition). The series' supervising director Dave Filoni cited Republic Commando as an inspiration when creating the clone characters from the show.

One of the squad's members, Scorch, later re-appeared in the 2021 sequel series, Star Wars: The Bad Batch. The helmet HUD design from the game was also briefly seen in the series.