The game doesn't develop in a linear fashion, which means that you're free to go where you want and do whatever you want to do. Still, you need to be careful about how far out you explore, or else your adventure may end prematurely.
One of the game's strong points is the incredible amount of customization that you can bring to your character. There are dozens of different abilities, hundreds of items and weapons, and many spells available for you to choose from.
Eschalon Book 1 is the beginning of an adventure that no RPG fan will want to miss.
You'll only be allowed to play the beginning of the adventure.