Alliance are a serie of different mods. On the Star Wars GC, you can play the civil war Empire vs Rebel era + Black Sun and soon the Republic and CIS.
Perhaps some of you recognize this starship from the force unleashed game and probably many of you do not know it. The model is exactly the same from the game, the textures are clearly from Nawrocki.
The wookipedia description is bad, if I am not wrong or bad memory, this starship was part from a rebel attack force and probably you can not find it in the game.