Wurm Online
Wurm Online is a sandbox MMORPG developed by Rolf Jansson and Markus “Notch” Persson and published by Code Club AB. The game is very player driven, and features an open, skill-based advancement system rather than classes, leveling, or quests. Wurm Online also features crafting, terraforming, mounts, ship and building construction, cooking, PvP, and much more. A version of Wurm Online was