GameSpy: Those suckers had a lot of hit points, I noticed. They really slow you down.
Bob Colayco: Right, but later in the game, when you've got tanks and other more powerful units, they go down real quick. So you can just bust through the side, if your opponent's been careless about scouting the side of their base.
GameSpy: I also saw some towers on the multiplayer maps -- can you talk about those?
Bob Colayco: Yeah, the Xel'Naga watchtowers. If you move a unit right next to it, it gives you line-of-sight over a huge area. So those are placed in strategic portions of the map.

Frank Pearce: Another thing we're trying to do is implement functionality within the units, to create strategic opportunities with the environment. So for instance, there's a Terran unit called the Reaper that has jump packs, allowing it to jump up and down cliffs. There's a Protoss unit called the Stalker that can teleport short distances. So it can teleport around and up and down obstacles...
GameSpy: So the map can have an impassible cliff face and the Terrans can spring a sneak attack through there?
Bob Colayco: Well, only certain Terran units. Like a marine wouldn't be able to get up there unless you had a drop-ship.

GameSpy: Will the single-player campaign be structured as before, walking the player through all three races?
Bob Colayco: The campaign touches on a lot of different characters across all three races. We look at the single-player as a way to get peoples' feet wet with how all the units work before they dive into the multiplayer. But there's still a lot of work to be done, designing and implementing the single-player campaign.
GameSpy: It sounds like development so far has really focused on multiplayer.
Frank Pearce: The dev team's focus right now is the single-player campaign. They have a lot of work to do on that.
GameSpy: What kinds of things are new in the single-player part of the game?
Bob Colayco: One thing that's new, as you go through the campaign... you know, normally in RTS games how they start you off with a couple of units and then it's like, "Okay, two missions later we're going to give you tanks..." So that those are chosen for you? One of the things we're looking at doing with StarCraft II's campaign is putting the choice more in the players' hands. So maybe you like dealing more with infantry? You can purchase those upgrades and make your marines and other infantry stronger. Or else you'll save up the credits you get from the missions to get tanks sooner than you normally could.