Hey there!
I recently gave a talk to the Vancouver Houdini User Group about how Houdini can be used for making visual effects for games. It was a reasonably short lecture (~45 minutes) so I decided to record it afterward and comment the Houdini file a little so I could share it online. The lecture is targeted at film people who would like to transition into games but aren't sure how to get started. It's not a step-by-step on creating fluids or any nonsense like that, but rather a look at some of the ways you might optimize an effect for real time.
If you're not familiar with who I am, I've written a little about how I got into games over on my blog: http://www.allegrodigital.com/?p=1991
Or you can go straight to the lecture which is free, and hosted on Udemy: https://www.udemy.com/game-effects-using-houdini-ue4
Hope it's of use to someone!