Is it illegal to modify game files? (Thru steam)

[Erhmet]

So I found a 7 Days to Die tool that requires you to delete the current Assembly-CSharp.dll file and replace it with the provided one. Is this illegal?

[Bravoheli]

facepalm (no)but you can get banned if hack gets detected and patched

[Erhmet]

Thanks.

And is a VAC ban just a ban that bans the game from being played or the account?

Also: If I didn't use it on a VAC server, am I fine?

[Lovroman]

Thanks.

And is a VAC ban just a ban that bans the game from being played or the account?

Also: If I didn't use it on a VAC server, am I fine?

Yea, 7 Days To Die VAC ban affects only 7 Days To Die and yes, I think so.