is it legal to install mod patches on videogames?

I was wondering if it was legal to install mod patches in games, for example, in the sims 3, there are patches that can remove the censorship, they can change the body type, the reactions, and all that, but to install them you kinda need to modify stuff a bit, is it legal???

No, it is not illegal. However, if you mess up your game the company who made it will not help you because you modified it.

It's legal.

Its your content. You bought it and you can do whatever you want with it.

Your game, your content, do what you want my friend.rmfd341

Valve even helps the modding community out by making mods of their games downloadable through steam.