Cracking / Patching Games (Dont delete or lock me :D)

[Stefan9]

But, most CDs are protected from copying, so even though you have a backup, you wont be able to play the game without an original unless you crack it.

It's very gray area over what you can and cant do to software you bought legally.

It depends how you write the backup. You need to use something like alcohol 120% or daemon tools or any dvd to create a matching image. You can them write this image to disc and have a backup. This is legal provided you have the original copy of the game.

I disagree with that, since Mods and so on alters the code of the game too ?

Some games specifically allow mods. It really depends what the license says. Also with a mod you aren't trying to reverse engineer anything so are generally just adding to the game while with a crack you are bypassing some of the mechanics of the game.