Widowmaker thrives when she can dominate at a range and use her one-shot one-kill snipes to her advantage. The very threat of potentially having your head taken off from a mile away forces players to act differently.
Junkertown is one of the maps where the hero gets the most value with its long sightlines leading to all sorts of pick-off potential. And, as it turns out, some walls on its second point can be shot through if timed right.
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