GREAT GAME!
if you like RTS/Strategy games this is a MUST BUY!
since it also supports THE greatest mods ever made for an rts wich is the Unification mod (you can find this mod on Moddb and they also have a discord with amazing people)
but if you want a good campaign take a look at the previous expansion wich are Winter Assault and Dark Crussade with the Base game
Soulstorm is mainly great due to is multiplayer and the massive ammount of mods available for it