The Merchandise:

Like many other multimedia projects (MMP) in the Galaxy Far Far Away, the Republic Commando project also had merchandise available. From officially licensed t-shirts, apparel, posters & badges, through to figures, busts, toys, music single & soundtrack.
 

The 2006 Saga Collection 7-figure pack (Delta Squad & Geonosians) release for Republic Commando:

^ more here: www.rebelscum.com/TSCdeltasquad.asp

The 2011 figure pack release for Republic Commando’s Delta Squad:

^ more here: www.amazon.com/Star-Wars-Republic-Commando-Exclusive/dp/B005EJAVQ0

The Omega Squad and Mandalorian Trainers figure pack release (a 2007 30th anniversary of Star Wars release):

^ more here: www.rebelscum.com/tacREFomega.asp

In recent years Republic Commando have also seen releases of Black Series figures, Funko Pops, Lego, and more.

‘Republic Commando - Toy Overview’ : 10 minute video from Rebel Scum (2021)

The Strategy Guide:

There was also the 128 page official strategy guide for the game, by Prima Games

‘The Game guide opened with the Prologue from the 2004 novel Republic Commando: Hard Contact, a tie-in to the video game Star Wars: Republic Commando. Told from the perspective of the Republic Commando Theta Squad member Darman, who retells their first and last mission to the planet Geonosis—the squad quickly gets overwhelmed and, save for Darman, they all perish. The prologue is followed by a short “How to use this guide” section, outlining the contents of the guide and the purpose of each section’.

^ more here: https://starwars.fandom.com/wiki/Star_Wars:_Republic_Commando:_Prima_Official_Game_Guide

The Soundtrack:

 
The soundtrack can be played at https://archive.org/details/RepublicCommandoOST

^ ‘This album was originally available as a free download on the official Republic Commando website, until the site was taken down. The MP3 files here are identical to the ones that were available on the website, with the exception of the addition of album artwork and lyrics for applicable tracks. Lyrics are in Mando’a and English translations are available. See Wookieepedia for full tracklist and online lyrics.’

more here: https://en.wikipedia.org/wiki/Star_Wars:_Republic_Commando#Soundtrack

The song “Clones”, written and performed by the band Ash for the game, is played when the credits roll - Ash - Clones (Star Wars: Republic Commando) - a 4 minute video at the official Ash YouTube channel.

^ “Clones” was also released as a single (along with an official video linked above), and reached No. 12 in the Irish charts.