Coba jelasin Returning characters dari Tekken 6 dong

Added in Bloodline Rebellion and console version.

Playable only in the "Millennium Tower" level in PlayStation 3 and Xbox 360 version in the scenario campaign.

Japanese gaming magazine Famitsu first announced in April 2006 that Tekken 6 was to be developed for the PlayStation 3. The first trailer was revealed at Sony's E3 press conference that year. According to Video Games Daily, feedback from the first trailer was negative. However, project director Katsuhiro Harada said at that time the team was not working on Tekken 6 full-time because they were busy developing Tekken Dark Resurrection. Harada's main concern with Tekken 6 was that it appeal to newcomers and older players. The game was released in Japanese arcades on November 26, 2007. It was the first game running on the PlayStation 3-based System 357 arcade board. Harada said Namco decided to make a Tekken installment for the Xbox 360 because of multiple fan requests. Response to the original arcade game was highly positive, but Harada said the team aimed to make more improvements to attract new players. He noted that feedback from the arcade's release in Japan had surpassed that of previous titles. For the updated release, the team wanted to include more playable characters than in Tekken 5, make the techniques unique as well as more intuitive, and  make the fights as brutal as possible.

However, Harada revealed they had encountered difficulties making the cast balanced. As a result, Namco took notes from the characters' victories in the original arcades and modified the cast and rebalanced the game. To make battles more strategic, the Rage system was created. Another new element is the use of items by the characters. While Harada did not find this as unique as the Rage System, he felt it added more to the battles' fun factor. Like some games in the Mortal Kombat series, Tekken 6 is notable for adding the element that allows players to throw enemies down to another area of the stage. This was added to create longer combos if the player has the opportunity, not for the sole purpose of inflicting more damage. A major obstacle in producing the game was Namco's idea to include game modes that allowed four simultaneous characters. This took major rework, especially for online mode. They avoided this for the spinoff Tekken Tag Tournament, which only allowed alternating use of four fighters. Director Yuichi Yonemori also noted that the team wanted to make fights faster while adding these new mechanics. To provide more variety, each stage that could be destroyed was given its own sound effect and each character also had their own.

On October 23, 2009, Namco Bandai released a Tekken 6 themed Game Space on the North American version of PlayStation Home. Tekken 6: Bloodline Rebellion was first released as Tekken 6 to Japanese arcades on December 18, 2008. It featured new characters, stages, items and customization options and gave the game a balance update to its characters and items. The console version of Tekken 6 is based on this arcade version and was released for consoles, but under the name Tekken 6. In October 2009, Namco announced the game's development had been completed, and it would be released for PlayStation 3 and Xbox 360 consoles. The online elements of Tekken 6 were based on the ones from Tekken: Dark Resurrection. Harada announced the game's roster would be the largest in the series, and that after Tekken 3 they were paying special attention to make sure each character is unique in appearance, personality and techniques and does not overlap with other characters. Preorders of the game included an artbook and a wireless controller.

This new version features two new characters: Alisa Bosconovitch, an android built in the image of Dr. Bosconovitch's deceased daughter, and Lars Alexandersson, Heihachi Mishima's illegitimate son and leader of a rebellious Tekken Force faction fighting Jin's tyranny. This expansion also features a number of new items and customization options for characters to use during fights. Unlike previous console games, all the characters are unlocked when the game starts. Harada said the reason behind this was his belief that unlocking characters was outdated, and that online gamers would find their favorite characters faster.

Unlike other new Tekken 6 characters who were based on fan input, both Lars and Alisa were created using a different approach, focusing on their importance to the game's story. As a result, in the arcade version of Tekken 6, most of Lars' identity was kept a mystery, leaving it to the console versions' Scenario Campaign mode to explain his role in the series, with Harada teasing about his potential attack on Jin Kazama's forces. Jin's characterization was changed from an anti-hero to a villain, something Harada had been planning to develop for years. However, his change of personality remained a secret to be explored in the story. Harada referred to the Scenario Campaign as a logical addition to the game. He believes the franchise is known for including bonus content in each installment, besides just being a recreation of the arcade game. He said the mode was meant to help the game appeal to a larger audience.

A number of artists joined the team to create new outfits for a few characters: Lars, Jin, Kazuya and Zafina were also given additional outfits designed by Masashi Kishimoto, Clamp, Takayuki Yamaguchi and Mutsumi Inomata, respectively. Outfits for Anna Williams and Asuka Kazama  were made by Mamoru Nagano, and Ito Ogure did one for Lili Rochefort.

Although the scenario campaign was removed from the PlayStation Portable's port, the developers added background information for the characters in the arcade mode. Makoto Iwai, chief operating officer of Namco Bandai, said the developers tried to make the PlayStation Portable contain as much content as the original console versions. For this reason, the PSP port has new modes and stages not present in the original one. In late 2009, Harada hinted at the possibility of the game having downloadable content but said that whenever possible it would be made available free of charge. In January 2019, Tekken 6 became playable on the Xbox One, thanks to its backwards compatibility function.