Secrets in Full Throttle
I personally don't remember having seen this image in Full Throttle...
... or this guy behind the bar at the Kickstand for that matter... (discovered by Cory Green)
And then we have all these images which look like concept art or sketches for scenes... (discovered by Kevin Christman, Campill François and Lasse Ojanen)
This isn't really secret, but lots of people keep mailing me about it. The rooms in Full Throttle containing all the music have a background image that looks like this: