Game World - The world itself is over 500 square miles (1,300 km2). There are no zones or 'instances' on the world's surface. This means you can cross the world, without loading screens or invisible barriers, and any terrain that can be seen in the distance is a real object in the world.
Magic - Each spell is learned from a scroll, either purchased or found as treasure. The more spells you discover and learn, the more flexibility and power at your disposal.
The Allegiance System - A player of equal or lower level can swear allegiance to a player of the same or higher level.
Crafting System - The four major crafting skills are: Cooking, Alchemy, Fletching, and Tinkering. These are interrelated; items created using one skill can often be utilized by the other skills to create advanced items.
Third Party Software - Mods and plugins are mostly allowed in Asheron's Call, which allows the creation of gameplay-altering experiences.