The Matrix

Anime
In acknowledgment of the strong influence of Japanese anime on the Matrix series, The Animatrix was produced in 2003 to coincide with the release of The Matrix Reloaded. This is a collection of nine animated short films intended to further flesh out the concepts, history, characters and setting of the series. The objective of The Animatrix project was to give other writers and directors the opportunity to lend their voices and interpretation to the Matrix universe; the Wachowskis conceived of and oversaw the process, and they wrote four of the segments themselves, although they were given to other directors to execute. Many of the segments were produced by notable figures from the world of Japanese animation. Four of the films were originally released on the series' official website, one was shown in cinemas with Dreamcatcher, one was shown on MTV, MTV2, MTV3, and MTV4, and the others first appeared with the DVD release of all nine shorts shortly after the release of The Matrix Reloaded.

Video games
On May 15, 2003, the game Enter the Matrix was released in North America concurrently with The Matrix Reloaded. The first of three video games related to the films, it told a story running parallel to The Matrix Reloaded and featured scenes that were shot during the filming of The Matrix Reloaded and The Matrix Revolutions.

Two more Matrix video games were released in 2005. The MMORPG The Matrix Online continued the story beyond The Matrix Revolutions, while The Matrix: Path of Neo allowed players to control Neo in scenes from the film trilogy.

Comic books
The Matrix Comics is a set of comic books and short stories based on the series and written and illustrated by figures from the comics industry; one of the comics was written by the Wachowskis and illustrated by the films' concept artist Geof Darrow. Most of the comics were originally presented for free on the Matrix series' website; they were later republished, along with some new material, in two printed trade paperback volumes.