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1.
a cool unit in Red Alert 2 that shoots a radiation cannon and can radiate the ground by pointing his gun at the ground and shooting
Desolators kickass!
by PlayDohMan May 08, 2004
 
2.
An advanced item in DotA (Defence of the Ancients), a Warcraft III game custom map.
To obtain it, you have to own 2 Mithrill Hammers and then get a desolator recipe from the level 3 recipe shop.
Desolator gives you +50 additional damage and an orb effect which causes armor decrease in enemies that you hit. It also changes projectile art of your attack.

Note: exactness of the information (e.g. damage) can depend on the version of the map
Player1: what item r u gonna build now?
Player2: hmmm.... i think i'll make a desolator..
by force.net November 15, 2006