Game Maker studio Standard edition is free for a limited time at yoyo games hen click on the first download button
Then click on the next download button.
Then during the install You will be asked to register. You specify your email address and then yoyo games email you a license key. NOTE: You need to do this carefully as it is very difficult to register after the install. Wait for the email and then cut and paste the registration key in the box provided and then continue with the installation. The standard edition is full featured without the restrictions of the free version. GET IT while you can.