Designed for Danger is the unofficial mini-campaign for Portal 2. Fans are starving for new content and Designed for Danger hopes to challenge even the saltiest vets.

The eight level expansion was designed by Patrick Murphy, and adds an extra two hours of game time. Designed to be far more difficult, these new levels were designed from scratch to give players a more hard-core experience. 

That's saying a lot considering some of those end game levels in Portal 2 made us feel like we'd been hit over the head with a pipe. Seriously. You can download the game below. Let us know what you think of the campaign on Twitter.

[via Designed For Danger]