According to Variety, Microsoft has finalized a deal to have Alex Garland (28 Days Later) adapt the bestselling video game franchise Halo into one movie. The trade says the screenplay will then be offered to studios as a complete "turnkey" script and rights package.

The "Halo" franchise is one of the most popular in video game history, having sold over 12.8 million units and grossed approximately $600 million since its 2001 debut. Last year, "Halo 2" sold 6.4 million copies and was the second-bestselling game of the year.

Sources say the the games' plot deals with a warrior soldier known only as "Master Chief" who battles a group of religious alien who believe one of their most sacred artifacts is located on Earth.

Alex Garland also wrote the screenplay The Beach starring Leonardo DiCaprio.