There are four Matrix movies made in total, and the order is as such:
The Matrix Reloaded
The Matrix Revolutions
The answer above is slightly misleading. The "Matrix Trilogy" involved the 3 films that were in the theatres: The Matrix, The Matrix Reloaded, and The Matrix Revolutions). The Animatrix was released as a complementary series, but was ancillary to the 3 main movies that formed the trilogy. Check out http://www.matrixeyewear.com.
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