Question concerning the title "Creature Master"

[doctor_fisto]

Hi everybody !

I'm currently aiming for the "PS perfect" title, and I have a question concerning the "Creature Master" title : could someone tell me what are the monsters that can only be encountered on coop mode, and where can you find them ?

Thank you very much in advance for your help ^^

[Infinite Eternity]

Zasharogan - True Darkness, requires three players to get to.

Kog Nadd - Cost of Research, requires two players.