Beatdown is an mirrored urban map for up to 8 Players with Bridges and Water Ways to flank your opponent.
Just unpack the package in your Maps folder as you do with any other map.
It is usually something like that C:/Users/yourName/Appdata/Roaming/CnC3 Maps
The Map has lots of crates all over it and fast growing blue and green tiberium. Ideal to play in teams of 2 or single-player.