does anyone know how to join a union ? or what is a union?

mine would be the folowing:

1. the c&c sries

2. max payen 1 and 2

3. doom 3

4. halo 1

5. Diablo 1

6. delta force: black hawk down: team saber ( for the online play )

7. fable 1

and the first neverwinter nights

P.S.does anyone have diablo 2 that i can download, or know where i can download it, like a website or something like that ????