Can i mod a xbox360 and playing only singleplayer

Modding a console is a violation of terms of service and when detected can result in the ban of both the hardware and your account

ok ,this applies to multiplayer games,but if I want to play single player,can xbox360 play a singleplayer offline xbox one game?

But some mods are fun, but only for singleplayer games, I don't care if someone hacks/mods a singleplayer game aslong as it doesn't have an affect on me.

So will can i play multiplayer or i can only play singleplayer?

Halo we aren't talking about mods that effect the multiplayer aspect we are talking about singleplayer mods. Huge difference and go to any game modding community on the pc and see how people are treated that create a mod to even make the singleplayer aspect
easier. Most of the mods that are popular are merely aesthetic changes see example above. Or little additions such as player created houses, weapons etc.