A Korean MMORPG based on the manhwa Ragnarok by Myung-Jin Lee, released in 2002 by Gravity Co., Ltd, using the engine from their previous game Arcturus. Its popularity spawned the anime Ragnarok the Animation.
Due to numerous hacks that leaked the source code during the beta years of the game, semi-legal emulated private servers became the most popular way to play for non-East Asian gamers. The game's overall settings and design, particularly its class system, would go on to inspire numerous fantasy MMORPG and media. The franchise itself received several spin-offs and reboots over the years.
