Ragnarok Battle Offline, or RBO, is a beat 'em up game for Microsoft Windows created by dōjin soft developer French-Bread. The soundtrack is composed by Lisa-Rec..
It is a homage and a spoof of the MMORPG Ragnarok Online created by Korean developer Gravity Corporation.
Though primarily a beat 'em up game, RBO also contains some RPG elements. The player creates a character from one of six basic classes and one unlockable class, allocate points to the character's stats and skills, and then enter one of the stages.
Up to 3 people can play at once, using the keyboard or joysticks or gamepads.