It's not a 3D game. Similar view to Divine Divinity or Diablo, but you can rotate the camera so that you can see behind walls. Come to think of it, it's closest to Dungeon Siege which is 3D.
<opens mouth, swaps feet>
Either way, it's third person with the camera set so you can see all around you. I considered the Tomb Raider camera style, but it wouldn't suit a number of the skills or the atmosphere.
I never finished Command & Conquer: TIberian Sun so I never knew what happened with the Tiberium. I guess it could be a bit like that. I haven't had a chance to play Fallout either. (I know... Shock! Horror!)
It is definately a single-character RPG. The closest you get to companions are the ones you can build yourself. There may be a few NPCs who join you from time to time.
And don't neglect your dream. Put it forward so that they may grow together!