In previous campaigns on Geonosis and planets like Bespin they were equipped with Phase I Clone Armor but have more recently upgraded to the Phase II Armor.
The elite Clone Troopers made up the majority of the Galactic Republic's Military and served on many different planets.
The Clone Trooper is the equivalent to the slower but more heavily armored Super Battle Droid, as well as the Rebel Soldier. Their successors are the Stormtroopers.
The Clone Trooper's pistol bears a striking resemblance to the DC-15S Blaster Carbine, albeit being one-handed.
The in-game Clone Troopers in Battlefront 2 are members of the 501st Legion.
When in the field of battle in the far reaches of the Galaxy, Clones would often personalize their armor to proclaim themselves as individuals. Instead of just cogs in the machine that was the Galactic Republic.