IO Entertainment has spent 4 years on Lost Saga development and conducted an internal test for the game for about 1 year. The biggest feature which differentiates Lost Saga from other MMORPGs is its character system. There are more than 100 characters available for choosing in Lost Saga, like Robin Hood, Captain Hook, western sharpshooters and various types of magicians normally found in legendary stories, as well as infantries and biochemical soldiers in modern society.