You can't throw that there/No Line of fire (aaaaaaaaaggggh!)
Time Units (yes

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Hunt the last alien, who usually hides in the highest room of the last building in the corner of the map.
The new Xcom game looks to be providing many more mission types - there's that weird looking machine spouting evil green smoke into the air, for example. That's got to be some sort of alien terror weapon that we have to disable/capture.
Yeah, that would be great. Maybe there is some of that sort of thing in there - we don't know yet. We do know that the commander (you) is asked via PA annoucements to go to various rooms.