Kurtzpel has an instance based dungeon system where you can complete solo epic story line missions, queue up with someone to face off against a harder version of the epic dungeons or compete in a 2v2 PvP match.
Each solo dungeon is tied to an NPC, and you will gain affinity and skills depending on which dungeon you complete. For example, Great Sword of Northern Kingdom: Chase is one of Ethan Solgard's affinity story line quests and thus will reward you with his affinity and Sword Taliah skills.
Epic (Single Player)
Epic dungeons are single player dungeons that will increase an NPCs affinity and contains story dialogue.
You can replay any of these missions from the History Mission tab.
Repeat versions of the dungeons are Real Time Missions where you must queue up with another player to battle a much harder version of the single player dungeon.
Players will start with limited amount of lives and if they're down for the count you must aid them by getting close to them to revive.
Since they are Real Time Missions, they only appear at certain times in the day so you must be quick!