Catz 4 has the gameplay of Catz 3 with the following new functions: going on holiday with your cat, letting your cat meet other pets, letting your cat enjoy music from your own computer and letting your cat play on a copied version on your desktop with your icons and wallpaper.
The game can be combined with Dogz 4. When combined it also gives you the possibility to raise rabbits and pigs as a bonus.
It also includes IBM Via Voice technology, which can be used to train your Catz if you have a microphone or headset plugged in to your computer, and includes travel scenes based on locations around the world. The scene editor allows you to create your very own scenes with any photo on your computer.
Your Catz need a lot of care and attention. If they are neglected, the program will warn you that they have ran away.