Wolfire Games and Steam are joining forces to create a giant, fire-blowing steam-powered wolf by making Wolfire’s Humble Indie Bundle playable on Steam.

If you bought the Humble Indie Bundle earlier this year, check your email for an activation key to get the goo flowing. The bundle includes World of Goo, Aquaria, Gish, Lugaru HD and Penumbra: Overture.

If you’re feeling left out of the indie love, it looks like Wolfire is planning a second round of the Humble Indie Bundle. The first one raised roughly $1.3 million for independent video games and charity, and 140,000 people got a bunch of awesome indie titles for a great deal.

Sign up for email notifications of the second Humble Indie Bundle and get to playing those awesome indie games on Steam right away, then share your adoration for Steam and Wolfire here!