Though it's still in orange version, this campaign works well. Bot navigation is fine. There are only few cons though. Some walls are invisible, but it's fine as it's still in orange version. Weapon selection is also limited. Somehow I didn't see any military sniper, ak47, & autoshotgun when I played. I only got the chrome shotgun & smg, & then rifle on the finale. The finale is kind of tricky. My instinct always directed me to the rolling door, but until the 2nd tank was killed & the endless horde + tank during rescue music came, the door was still closed. I even tracked back the paths to the saferoom but there's no sign about the rescue vehicle. Then, I went back to the room where I pushed the radio & patrolled there. & the rescue vehicle was just hiding behind a room :D . . Anyway, though this campaign is short, I can see that it still has potentials to tweak & make it longer & more interesting. For example, instead of just opening the doors & defending during the process of opening doors, adding some events like running to the saferoom or turning of an alarm can make it more fun. Anyway, good job, & I'm looking forward to the full version (non-orange version).