Saga is a persistent-world real-time strategy game set in a fantasy universe inhabited by Elves, Dwarves, Ogres, Giants, Demons, Dark Elves and mechanical beings. Players collect troops, build armies, conquer new lands and build up kingdoms that exist even when the player is not online, complete with resource collection, city building and peasant management. Saga includes massive armies that gain experience through subsequent battles, multiplayer questing, an auction house for trading troops and spells, guild wars and espionage.

Saga has no subscription fees. Players pay as little or as much as they decide, by purchasing "booster packs" of random troops and spells, which are traded and customized to create the strategic army of choice for each player.