If you're in the mood to throw a ball at other people's faces, with the aim to cause as much damage as possible, then you definitely need Lethal League. What's more, you can get it from Fanatical for free!
You can click this link, or the green button on the right of the screen, to go to Fanatical, then sign in and link your Steam account. Once that's done, you will get your Steam key!
It's a saving of £9.99, but full disclosure they are affiliate links.