The official Trackmania Sunrise eXtreme expansion is now available to download completely free of charge.
If you own Trackmania Sunrise then you can now download the all new official expansion, featuring many new tracks and features, a new stunt game mode, and more "eXtreme" building blocks to create even more insane tracks. The exact details on what the expansion includes are a little vague, but it's free.
You can grab the 400mb expansion from 3DGamers, but you will need the full retail version of Trackmania Sunrise in order to install it.
