u could do it like murderball but backwards
make a burrowble unit for you and create it burrowed then
Give it to the computer that has disabled for burrow. it should not unburrow

its in murderball and my upcoming map..
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No, it will still unburrow since Blizzard did not expect people to do things like this, and didn't make them make sure they have burrow researched to unburrow.
but... but... the attacking thing is right... as long as it doesnt have to move to attack something it doesnt...
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Huh? If you move a unit right in front of a siege tank in siege mode, it will go out of siege mode even if they don't have it researched. I'm not sure if it does this for hero tanks though.