The appearance of cats in video games is always a good thing, but Possessable Cats are particularly awesome. They can improve any video game experience, no matter how mediocre. This was proven several times during various MURDERED: Soul Suspect streams, in which there was a small gray cat which could be possessed by the player at various points throughout the game to solve different puzzles. This cat was especially cool because it had a "meow" button that Phil could press over and over again. It has also been theorized that the cat was actually way smarter than the protagonist of that game.
The presence of a possessable cat is guaranteed to send chat into paroxysms of delight as they all scream "OMG CAT!!!" like the fully mature adults that they are.