"Cambot! Gypsy! Tom Servo! Crooooow!"
“Look at me! I’m dancin’! I’m dancin’!” (Claptrap)
For what reasons HP1 has bad compatibility with TP? Its just contains characters and little amount of Hero/Zombie cards+1 scenario. All of this staff seems "universal", except, maybe, of scenario.
With the Survival of the Fittest expansion, these heroes work with cards and locations that do not appear in Timber Peak.