Divergent/mods/Gear Rustle Redone/gamedata/scripts/gear_rustle_sounds.script

function on_game_start()
    RegisterScriptCallback("actor_on_footstep", actor_on_footstep)
end

function actor_on_footstep()
    xr_effects.play_snd(db.actor, nil, {
        [1] = "gear-rustle\\tac_gear_" .. math.random(40)
    })
end