The Jedi are held responsible for the success of the Sith during the devastating 28-year-long Great Galactic War (which led to the Treaty of Coruscant prior to the "cold war"), and thus choose to relocate from Coruscant to Tython, where the Jedi Order had initially been founded, to seek guidance from the Force. The Sith control Korriban, where they have re-established a Sith Academy. The game's "Return" cinematic trailer depicts the events where Korriban is re-conquered by the Sith.
During these events, a smuggler named Nico Okarr is being led to his prison cell in a jail orbiting Korriban by a Jedi, Satele Shan, and her master, Kao Cen Darach. Suddenly, a Sith named Darth Malgus, and his master Vindican, along with several Sith troops, attack the base. Satele, a trooper named Jace Malcom, and Okarr escape the attack, but Darach is cut down by Malgus. Malgus then kills Vindican, who was wounded by Darach. 10 years later, new conflicts have arisen. In the "Hope" cinematic trailer, Satele and some troops destroy a Sith party that includes Malgus, and Malcom, who has become the troop's commander, states that, despite the losses, there is still hope amongst even "a single spark of courage". Later in the "Deceived" cinematic trailer, however, Malgus, having appeared to survive the earlier attack albeit with a mask covering his nose and mouth, leads an army of Sith into the Jedi Temple on Coruscant, killing many Jedi including the Jedi Master Ven Zallow.
After the death of Jedi Grand Master Zym, Master Satele Shan is named the new Jedi Grand Master. The game itself is set in the cold-war soon after these events, with the Jedi Order and Galactic Republic struggling to maintain their control of the core worlds while the Sith plot their downfall and the expansion of the Sith Empire. The conflict opens on many fronts and across many planets, while native factions are engaged in political struggles or civil war.
BioWare stated, prior to release, that the game would have a significant focus on the storyline. Each of the eight classes has a three act storyline that progresses as the character levels up. A collaborative effort between BioWare, LucasArts, EA Games and Dark Horse Comics has resulted in webcomics entitled Star Wars: The Old Republic – Threat of Peace and Star Wars: The Old Republic – Blood of the Empire, the purpose of which is to establish the backstory as the game opens and closes.
Gameplay
Players join as members of either of the two main factions – the Galactic Republic and the Sith Empire. Although each faction is led by a benevolent or malevolent leader, it is emphasized that an individual member may possess a morality at any point along the light/dark spectrum. The project's key focus is to differentiate between the player's faction and morality. For instance, a member with ties to the Galactic Republic may belong to the dark side while attempting to achieve their own ends, which may be misaligned or dissimilar from the Republic's vision.
Player advancement occurs by a combination of mission completion, exploration, and defeating enemies. New skills, unlocked by level, are taught by trainers and can be learned in game at a multitude of locations. Heroic missions exist that require the cooperation of multiple players to complete objectives, and can be repeated normally on a daily basis.
While each class in The Old Republic favors a certain play style (ranged/melee damage, healing or support skills, or tanking), customization combined with companion characters allow for a class to be able to tackle many different situations, with or without the support of other player characters, and without requiring specific other classes in order to move forward.
Players' choices permanently open or close storylines and affect players' non-player character (NPC) companions. It is intended that the game should provide more context for characters' missions than any previous MMORPG. Every character in the game, including the player character, features full voice dialog to enhance gameplay, and interactions feature a dialogue system similar to that used in the Mass Effect series. Players are able to choose from a variety of NPCs, although spending time with a single companion will help more in developing story and content than dividing time among several, and may even develop a love interest. It is possible for players to "blow it big time" if they fail to meet NPCs' expectations. Players also have access to several planets, including Korriban, Ord Mantell, Nal Hutta, Tython, Coruscant, Balmorra, Alderaan, Tatooine, Dromund Kaas, Taris, Belsavis, Voss, Hoth, Corellia, Ilum and Quesh, and the moon Nar Shaddaa. The planet Makeb was added in Patch 2.0, along with the Rise of the Hutt Cartel Expansion.
Every player receives their own starship, which was announced at Electronic Entertainment Expo 2010. Footage of space combat was released at Gamescom. The short clip provided by BioWare revealed that space combat would be a "tunnel shooter". A tunnel shooter, otherwise known as a scrolling shooter or rail shooter, is a flying game where the player is on a predetermined track. Game play includes moving right and left on the X axis and up and down on the Y axis; however, players do not have control of the speed of their space craft. Jake Neri, LucasArts Producer, told PC Gamer in their October 2010 issue that their goal was to "capture the most cinematic moments that we can create. We want players to get in and feel like they're in the movies. It's about highly cinematic, controlled combat moments ... very heroic, action-packed, exciting, visceral and dangerous encounters that'll make you pee your pants." With the December 2013 release of the free expansion, Galactic Starfighter (GSF), players now have a free flight PVP space combat experience, with multiple ships and roles independent of other aspects of the game.
Like many other MMORPGs, the game features dungeons and raids in the form of Flashpoints and Operations respectively.