And so, how do I play the Katana HERO DLC? It's simple:
1. Go to your Steam library.
2. Click on the Katana ZERO Right Mouse Button.

3. Click on "Properties".



4. Click on "Beta versions".




5. Click on the line "Closed beta versions" and then write the code there: "notthedlcbro", press Enter.
6. And then write the code there: "notthedlcbro", press Enter.




7. Click update.
8. We are waiting for an update, then we go in and enjoy.
p.s. if you passed katana ZERO, then you will complete the DLC in 1h.


Note: If the game has been started, be sure to restart!!
Note: this is my first guide, if there is a mistake somewhere, it's my fault, I'm sorry..