There are a variety of websites which enable you to download cracks for games for free! Here is a site which I have found really useful where you can download a variety of cracks for games onto your PC or laptop.
www.gamescrack.org - This site enables you to download directly from their website giving you fully working cracks for games such as Transformers Rise of the Dark Spark Crack, Arma 3, Aliens Colonial and many more.
Here's what you have to do to download a crack from this site:
1.Download the game crack and the installer from www.gamescrack.org
2. Open the ISO file and install the game
3. Extract the crack archive which you will find in your desktop folder
4. Copy the extracted content into the desktop folder
5. Run the game as the administrator through exe.as
You will then be able to play and enjoy your game for absolutely free!
I do also have to throw in a warning that, personally, I would recommend only using cracks for games that you are allowed to access for free. Using a crack on a game without permission could be considered illegal.
Also beware whenever you download cracks from sites you're not familiar with, as they may contain malware.
I hope this helps to answer your question :) Happy gaming!