overwatch_counters.json

{
    "ana"        : ["lucio", "zenyatta", "mercy"],
    "bastion"    : ["reinhardt", "torbjorn", "winston"],
    "dva"        : ["pharah", "widowmaker", "reinhardt"],
    "genji"      : ["bastion", "mercy", "widowmaker"],
    "hanzo"      : ["torbjorn","bastion", "widowmaker"],
    "junkrat"    : ["bastion", "mei", "torbjorn"],
    "lucio"      : ["winston", "dva", "reaper"],
    "mccree"     : ["reaper", "tracer", "winston"],
    "mei"        : ["winston", "tracer", "genji"],
    "mercy"      : ["No one."],
    "orisa"      : ["reinhardt", "torbjorn", "roadhog"],
    "pharah"     : ["junkrat", "bastion", "mei"],
    "reaper"     : ["bastion", "mei", "winston"],
    "reinhardt"  : ["soldier76", "torbjorn", "tracer"],
    "roadhog"    : ["pharah", "reinhardt", "tracer"],
    "soldier76"  : ["torbjorn", "pharah", "mercy"],
    "sombra"     : ["bastion", "pharah", "mercy"],
    "symmetra"   : ["bastion", "dva", "reinhardt"],
    "torbjorn"   : ["genji", "lucio", "tracer"],
    "tracer"     : ["widowmaker", "orisa", "mercy", "bastion"],
    "widowmaker" : ["orisa", "pharah", "torbjorn"],
    "winston"    : ["genji", "widowmaker", "hanzo"],
    "zarya"      : ["dva", "winston", "genji"],
    "zenyatta"   : ["dva", "roadhog", "winston"]
}