Steam News has details on a new patch that's automatically available for I am Bread on Steam which adds Team Fortress 2 content to Bossa Studios' not gluten-free adventure. Here's word on the patch and a sale:

I am Bread has just been updated with a new Team Fortress 2 level and is 50% off!*

Become Sandvich!
Play the brand new Team Fortress 2-themed level of I Am Bread!

Control a slice of bread and avoid all the obstacles in your path to become toast! Can you make your slice do strange, wonderful things with the Heavy?

To celebrate the new level there's a 50% sale on I Am Bread for a limited time.
The new TF2 level is available as a free update for all I Am Bread owners.

Trust us when we say you really knead this...

*Offer ends August 20 at 10AM Pacific Time on August 20th.