Step 1. Open Portal 2 ( )
Step 2.Enable the console by going to keyboard settings and enable the bottom option called enable developer console.
Step 3. click "~" in-game and type in the following codes.
bind v noclip
bind b fire_rocket_projectile
Step 4. Press 'b' and watch you fire rockets
Step 5. click V and go through everything.
Enjoy owning like a boss. heres some more for you.