Metroid Prime: Trilogy is a 2009 action-adventure game compilation developed by Retro Studios and published by Nintendo for the Wii. It compiles three entries from the Metroid franchise: Metroid Prime (2002), Metroid Prime 2: Echoes (2004) and Metroid Prime 3: Corruption (2007).

Prime and Echoes, originally developed for the GameCube, were updated with features first implemented in Corruption, such as a control scheme based on the Wii Remote and Nunchuk and a credits system supported by the WiiConnect24 internet service.

Metroid Prime: Trilogy was released in North America in August 2009, followed by Europe and Australia in September and October. It was not released in Japan, where ports of Prime and Echoes were released separately as part of the New Play Control! series. In January 2010, Nintendo discontinued Trilogy in North America and Australia.

Metroid Prime: Trilogy was acclaimed, with praise for the new controls, updated presentation, credits system, and value for money. It was rereleased on the Wii U's Nintendo eShop in January 2015.

Metroid Prime: Trilogy is a video game compilation which includes Metroid Prime, Metroid Prime 2: Echoes and Metroid Prime 3: Corruption. The first two games were originally released for the GameCube and did not feature motion controls. The updated Wii versions of Prime and Echoes, which were released separately in Japan as part of the New Play Control! series, utilize the same Wii Remote control scheme introduced in Corruption. The Spring Ball ability featured in Corruption is also implemented in the first two games. Other changes include faster load times, updated textures, bloom lighting, and 16:9 widescreen support, but the heads-up display is always shown at the original aspect ratio, causing it to be stretched horizontally when in widescreen mode.

The credits system from Corruption was incorporated into the first two games. Players can earn credits by accomplishing certain tasks, allowing them to unlock in-game items such as artwork, music, a screenshot feature, decorative items for Samus' gunship in Corruption, and the Fusion Suit in Prime, in which the latter was previously unlocked by connecting the Game Boy Advance game Metroid Fusion. Credits could also be shared with registered Wii friends, who also have a copy of Trilogy, via WiiConnect24 which used the Wii's own 16-digit number as opposed to a separate Friend Code. The save data for the original release of Corruption cannot be carried over to its Trilogy version. The compilation also features the multiplayer mode from Echoes, which is limited to four-player local multiplayer and does not feature online play. In response to complaints from players and critics about Echoes's high difficulty during some of the boss battles, the difficulty of those encounters was lowered. The games are accessible through a new, unified main menu, which also allows independent access to the Echoes multiplayer mode, the extras menu, and other settings.

In 2004, while Retro Studios was finishing work on Metroid Prime 2: Echoes, senior producer Bryan Walker suggested to studio president Michael Kelbaugh to "do something for the fans by putting all the games together on a single disc in a collector[']s 'trilogy' edition". Kelbaugh sent the proposal to Nintendo, who excitedly agreed. Development on the collection began shortly before the launch of Metroid Prime 3: Corruption, and Retro employed a team of four staff members, as most of the crew were busy with Donkey Kong Country Returns. Prime series producer Kensuke Tanabe asked the staff to resolve most of the glitches for the Trilogy release to prevent sequence breaking.

Walker considered the compilation "an almost unheard of opportunity to take something you had already released and make it better". Senior designer Mike Wikan said most of the additions were subtle, such as higher-resolution textures and streamlining the engines for steady framerates and shorter loading times. The team added bloom lighting to Prime, adjusted the difficulty of Echoes to make it more accessible to new players, and optimized Corruption to run more efficiently. The particle and water ripple effects in Prime were reduced, and the word "damn", uttered by the character Admiral Dane in Corruption, was replaced with "no".