Everything you need to play TA Spring, including the core files, two different maps, and the TA mod XTA.
This mod, like all TA mods, contains content from the game Total Annihilation.
Therefore you will have to own a copy of TA to legally use this content.
* Large battles limited only by the power of your computer; support for up to 5000 units.
* Large, highly detailed maps in which to wage those battles, fully 3D with deformable terrain, forest fires, dynamic and reflective water, and custom skyboxes.
* Several camera modes, allowing for anything to be viewed from almost any angle.
* Fully 3D combat in land, sea, and air, with realistic weapon trajectories.
* Many different mods, some of them originally from Total Annihilation, and some made just for Spring.
* Compatible with unit files from Total Annihilation, allowing 3rd party units to easily be moved into Spring.
* Complex 3rd party AIs, some of which are quite good.
* An extremely powerful GUI, designed to minimise unneccesary micromanagement.
* Frequent additions and bugfixes.
More from the game website here... http://spring.clan-sy.com/wiki/SetupGuide
Source: Free Online Fun