Champions of Regnum (previously known as Regnum Online) is a fantasy massively multiplayer online role-playing game (MMORPG) developed and published by Nimble Giant Entertainment, a game development studio located in Argentina.

Players create characters as their avatars in a fantasy medieval-themed persistent virtual world.

At present, the full range of classes are: Marksman, Hunter, Barbarian, Knight, Warlock and Conjurer.

Combat skills, stealth and spells are drawn primarily from the lore of DAOC and Dungeons & Dragons, with much shorter durations and magnified effects.

Andrés Chilkowski worked on Regnum, a real time strategy video game, published by Conde Entertainment Software in 1995.

[7] They wished to create an RTS game similar to Dune II, leading to the development of Regnum.

[9] Massively wrote: "I have a feeling that if Regnum Online could make its beginning levels, you know, fun, then it could be a great game.

"[10] Softpedia summarized: "Champions of Regnum packs all the cliches one can remember when it comes to free-to-play MMOs.