Here is an overview of the game, via its Steam page:

About

Creature Keeper is a monster-taming game where you fight alongside the creatures you’ve befriended in real time. Form a party of your favorite creatures and strengthen them by cooking yummy food, crafting trinkets, earning power ups via your Pocket Garden, and nabbing unlockables from the Bestiary.

Key Features

• A New Kind of Hero – Take up the ancient role of a Creature Keeper. A strange sickness is affecting otherwise healthy creatures and you must uncover its mysteries to restore balance to a world divided.
• Befriend a Small Army of Creatures – Assemble your dream team by befriending a bevy of creatures to fight alongside you.
• Strengthen Creatures with Food – Learn recipes while adventuring and cook up tasty meals to help your creatures grow in their own special way.
• As Creatures Grow, So Do You – More knowledge = more power! Raise your party and fight corrupted creatures to unlock creature notes, skills, recipes, and more in the Bestiary.
• Craft Equipment for Yourself and Creatures – Customize your play style by crafting a variety of weapons and trinkets with unique effects.
• Explore the Magic of the Pocket Garden – Grow ingredients, power ups, equipment, and more with your Pocket Garden, a magical portable farm.
• Creatures with Style – Craft fashion items such as hats, masks, and accessories for your creatures to wear!

Watch a new trailer below. View a new set of screenshots at the gallery.