Aimbot x hitbox expander for bot and npc

-- Aimbot & Transparent Box Hitbox Expander (Bot/NPC only)
-- Made by ryu949

--// Services
local Workspace = game:GetService("Workspace")
local Players = game:GetService("Players")
local camera = workspace.CurrentCamera
local RunService = game:GetService("RunService")

--// Settings for Hitbox
local BoxSize = Vector3.new(10, 10, 10)
local BoxColor = Color3.fromRGB(255, 255, 255)
local Transparency = 0.5

--// Aimbot Settings
local aimbotEnabled = false
local smoothingFactor = 0.15

--// Check if model is a player
local function isPlayer(model)
    for _, player in pairs(Players:GetPlayers()) do
        if player.Character == model then
            return true
        end
    end
    return false
end

--// Create fake transparent hitbox
local function addBox(model)
    if not isPlayer(model) and model:FindFirstChild("HumanoidRootPart") then
        if model:FindFirstChild("FakeHitbox") then return end

        local box = Instance.new("Part")
        box.Name = "FakeHitbox"
        box.Size = BoxSize
        box.Transparency = Transparency
        box.Color = BoxColor
        box.Anchored = false
        box.CanCollide = false
        box.Massless = true
        box.Material = Enum.Material.ForceField
        box.CFrame = model.HumanoidRootPart.CFrame
        box.Parent = model

        local weld = Instance.new("WeldConstraint")
        weld.Part0 = box
        weld.Part1 = model.HumanoidRootPart
        weld.Parent = box
    end
end

--// Apply to existing bots/NPCs
for _, npc in pairs(Workspace:GetDescendants()) do
    if npc:IsA("Model") and npc:FindFirstChild("Humanoid") and npc:FindFirstChild("HumanoidRootPart") and not isPlayer(npc) then
        addBox(npc)
    end
end

--// Apply to future bots/NPCs
Workspace.DescendantAdded:Connect(function(descendant)
    task.wait(0.5)
    if descendant:IsA("Model") and descendant:FindFirstChild("Humanoid") and descendant:FindFirstChild("HumanoidRootPart") and not isPlayer(descendant) then
        addBox(descendant)
    end
end)

-- GUI Button for Aimbot
local screenGui = Instance.new("ScreenGui", game.CoreGui)
screenGui.Name = "AimbotUI"

local button = Instance.new("TextButton")
button.Name = "AimbotToggle"
button.Size = UDim2.new(0, 200, 0, 50)
button.Position = UDim2.new(1, -210, 0, 20)
button.BackgroundColor3 = Color3.fromRGB(20, 20, 20)
button.TextColor3 = Color3.fromRGB(255, 255, 255)
button.Text = "Aimbot: OFF"
button.Font = Enum.Font.SourceSansBold
button.TextScaled = true
button.Parent = screenGui

local corner = Instance.new("UICorner")
corner.CornerRadius = UDim.new(0, 10)
corner.Parent = button

-- Target only NPCs/Bots and lock onto the Head (never below)
local function getClosestTarget()
    local closestPart = nil
    local shortestDist = math.huge
    for _, model in ipairs(workspace:GetDescendants()) do
        if model:IsA("Model") and model ~= Players.LocalPlayer.Character then
            local hum = model:FindFirstChildOfClass("Humanoid")
            if hum and hum.Health > 0 then
                if not isPlayer(model) then
                    local targetPart = model:FindFirstChild("Head") or model:FindFirstChild("UpperTorso")
                    if targetPart then
                        local dist = (targetPart.Position - camera.CFrame.Position).Magnitude
                        if dist < shortestDist then
                            shortestDist = dist
                            closestPart = targetPart
                        end
                    end
                end
            end
        end
    end
    return closestPart
end

-- Smooth camera aim with prediction using Heartbeat
RunService.Heartbeat:Connect(function()
    if aimbotEnabled then
        local target = getClosestTarget()
        if target then
            local camPos = camera.CFrame.Position

            local prediction = target.Position
            if target:IsA("BasePart") and target.AssemblyLinearVelocity then
                prediction = target.Position + target.AssemblyLinearVelocity * 0.04
            end

            local smoothed = camPos + (prediction - camPos) * smoothingFactor
            camera.CFrame = CFrame.new(smoothed, prediction)
        end
    end
end)

-- Toggle Aimbot
button.MouseButton1Click:Connect(function()
    aimbotEnabled = not aimbotEnabled
    button.Text = aimbotEnabled and "Aimbot: ON" or "Aimbot: OFF"
end)