...Actually I can imagine their paths crossing in exactly one circumstance: Shawn, on vacation far from Santa Barbara, stumbles upon the vast numbers of bodies Nate has left in his wake and is just like, okay, but see, I only do one of these at a time. Or okay, sometimes two, but -- look, half a dozen tops. This just isn't my thing -- back me up on this, Gus!

Oh, wow, suddenly I really want this. (And I love your voice for Shawn!) But I suppose it's hard to deal with the tonal clash between Psych, where murder is a major thing, and Uncharted, where you can murder twenty guys before breakfast while still remaining sympathetic and loveable. If you put Nate in the Psych universe, suddenly he's a murderer! And that doesn't work; Nate's not a murderer! He's just... someone who... kills... a lot of people... incidentally.