Mandalore the Preserver a.k.a. Canderous Ordo image - Mandalorians

"I am Mandalore, leader of the Mandalorians. I will help you fight your battles and plan your strategy. But I will not be your errand boy. Find some other lackey to do your bidding."
―Mandalore to the Jedi Exile

i played it too, but too many mandalorians died :(
and i like his suit.

He has a Zersium Rifle as his Primary weapon. Although if you have any stronger rifles you might want to replace it.

Darth Nihilus is a bit easy to kill. But Darth Traya is very hard to kill.
The final planet is hard (Malachor V).

The Second Galactic Civil War, originally called the Second Corellian Insurrection, and also known as the Confederation–Galactic Alliance War, Corellian–Galactic Alliance War, and New Galactic Civil War, lasting from 40 ABY to 41 ABY, was a conflict originally between the Five Worlds—which later grew to become an interstellar alliance known as the Confederation—and the Galactic Federation of Free Alliances. The conflict began when the Corellian system seceded from the Alliance, and gained allies such as Bothawui, Bespin, and Fondor, forming the Confederation. As the conflict quickly became massive, the New Jedi Order battled the rebels alongside the Alliance. Many people who had fought together during the First Galactic Civil War and Yuuzhan Vong War found themselves on opposing sides during the conflict.

After a while, many events in the war became uncontrollable. The Galactic Alliance Guard committed acts that some viewed as heroism and others as dictatorship, such as the assassination of certain dissidents. In a coup, Admiral Cha Niathal and Colonel Jacen Solo ousted Chief of State Cal Omas and took his place on Coruscant. Jacen secretly became Darth Caedus, the new Dark Lord of the Sith, after killing Mara Jade Skywalker, and the recently removed Cal Omas was killed. During the Battle of Kuat, the New Jedi Order withdrew from the Alliance, and in the aftermath of Caedus's actions at the Battle of Kashyyyk, they formed the Jedi Coalition. Following this battle, the war became a three-way conflict.

The war continued with the Galactic Alliance now facing two rebellious factions. The Jedi destroyed Centerpoint Station to prevent it from falling into enemy hands but failed to capture Caedus. The latter allied himself with the Imperial Remnant, and a major battle occurred at Fondor. During the Second Battle of Fondor, Grand Admiral Gilad Pellaeon was executed after refusing to obey Caedus's forces, and Niathal and her allies joined the Jedi Coalition as the Alliance-in-exile. Concurrently, Jedi Knight Jaina Solo, trained under Boba Fett, leader of the Mandalorians, in order to take down her brother, who was completely consumed by the dark side. In a climactic duel, Jaina defeated her brother, as well as his Sith order. The Jedi, along with Niathal's faction of the Galactic Alliance retook control of Coruscant, and the Jedi placed Jagged Fel as the leader of the Imperial Remnant. The aftermath of the war led to tense relations between the Alliance and the Jedi.

Combatants
Galactic Alliance (split into the Alliance-in-exile)
New Jedi Order (formed Jedi Coalition)
Lumiya's Sith †
Imperial Remnant (joined Jedi Coalition)
Hapes Consortium (joined Jedi Coalition)
Five Worlds / Confederation
Jedi Coalition (following Battle of Kashyyyk)
Alliance-in-exile
Mandalorians (Following the Second Battle of Fondor)

The Jedi Coalition was a coalition government between the New Jedi Order and the Alliance-in-exile, along with the Maw Irregular Fleet and the Mandalorians. It was officially formed by Luke Skywalker after the Battle of Kashyyyk in response to Darth Caedus's rule of the Galactic Alliance. Their objective was to remove Caedus from power so they could peacefully end the Second Galactic Civil War.