This is a potion and alchemy game where every potion you discover, either by experimentation or by learning a recipe from books sold and found in the world, has a gameplay effect when drunk or thrown at an enemy. There are over 100 unique potions to discover, and only a few dozen have recipes you can find in books. You begin with a gerbil as a test subject and a modest inventory of ingredients that you are supplied with indefinitely, and you'll need to explore nearby towns to buy or gather additional ingredients and test subjects.
Your objective? World domination... or liberation. The choice is yours.
You'll need to mutate powerful creatures, find a way to make money to rebuild your once grand castle, and make contacts with people who will provide various services and support.