
1) First-person shooter 2) Windows game
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https://www.crosswordclues.com/clue/dirty-bomb

A dirty bomb is a speculative radiological weapon that combines radioactive material with conventional explosives. The purpose of the weapon is to contaminate the area around the dispersal agent/conventional explosion with radioactive material, serving primarily as an area denial device against civilians. It is however not to be confused with a nu...
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http://en.wikipedia.org/wiki/Dirty_bomb

A dirty bomb is an improvised nuclear device, created from radioactive nuclear waste material and conventional explosives. When a dirty bomb is detonated the explosion carries the nuclear waste material into the atmosphere where it is subject to dispersal by wind and rain. The aim of the dirty bomb is to cause wide-spread contamination of the targ...
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http://www.encyclo.co.uk/local/20762

See RDD.
Found on
http://www.encyclo.co.uk/local/20790

a device designed to spread radioactive material by conventional explosives when the bomb explodes. A dirty bomb kills or injures people through the initial blast of the conventional explosive and spreads radioactive contamination over possibly a large area
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http://www.encyclo.co.uk/local/21808
noun an atom bomb that leaves considerable radioactive contamination
Found on
https://www.encyclo.co.uk/local/20974

a nuclear warhead designed to produce a great amount of radioactive debris by use of a fusion core, fission trigger, and casing of uranium-238.
Found on
https://www.infoplease.com/dictionary/dirty-bomb
No exact match found.