Legendary Edition consolidated not only the three games, but almost all of their original downloadable and other content, with a few exceptions. This featured many changes to Mass Effect and its sequels Mass Effect 2, and Mass Effect 3, including major overhauls to graphical quality and gameplay. In 2021, a comprehensive remaster of all three games in the original Mass Effect trilogy was released, dubbed Mass Effect Legendary Edition. A standalone digital version of Mass Effect was also made available via the PlayStation Store, and was released on the same day as the PlayStation 3 version of the Trilogy. A PlayStation 3 version of the Trilogy, which brings Mass Effect to that console for the first time, was released on Decemworldwide and Decemin Europe. The Trilogy was released on Novemfor Xbox 360 and PC. Mass Effect is also included in the Mass Effect Trilogy, a boxed set containing all three Mass Effect games. A Platinum Hits version of Mass Effect for Xbox 360 was also released, and included a bonus disc containing the game's soundtrack, the Bring Down the Sky DLC pack, trailers for the game, and pictures and themes for Xbox Live profiles. Mass Effect is available via Xbox's Games on Demand. A Japanese-language version was in development for the Xbox 360 only. By Summer 2008 there were also versions of the game translated into Spanish, French and Italian.

The game was later re-released by BioWare and Demiurge Studios for the PC, and the PC-DVD version was released in Summer 2008.

It was also released as a Limited Collector's Edition, containing bonus materials including an art book and the Galactic Codex: Essentials Edition 2183 booklet, which gives background on the Mass Effect universe. Mass Effect was released on Novemin North America, Novemin Australia and New Zealand, and on Novemin Europe.

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