When a player dies, I want it to play a certain audio. I've already tried the died event Help?

Your script didn't work for 2 reasons, reason 1 would be that you did not have the url for the sound you just had numbers. Number two would be you need three ends at the end of the script with three of these braces )

1.the url should be http://www.roblox.com/asset/?id=143796003
2. end) end) end) 

--here is the script fixed 

game:GetService('Players').PlayerAdded:connect(function(player)
player.CharacterAdded:connect(function(character) character:WaitForChild("Humanoid").Died:connect(function() print(player.Name .. " has died!") local s = Instance.new("Sound")

s.Name = "Sound" 
s.SoundId = "http://www.roblox.com/asset/?id=143796003" 
s.Volume = 3 
s.Looped = false
s.archivable = false
s.Parent = game.Workspace
wait(0)
s:play()

end)
end)
end)

I'll give you an idea Intructions:

1. Create a LocalScript and a Script into ScreenGui 2. Put this inside both of the scripts:

while true do
wait(0.5)
if script.Parent.Parent.Character.Humanoid.Health <= 0 then
local s = Instance.new("Sound", game.Workspace)
s.SoundId = "rbxassetid://143796003"
s.Volume = 3
s.Looped = false
wait()
s:Play()
wait(5)-- put time amount to remove
s:remove()
end
end

ALSO YOUR SOUND ID SHOULD BE "rbxassetid://143796003"

s.SoundId = "http://www.roblox.com/asset/?id=143796003"