A plain world with many biomes and terrains, and every once in a while there's a small town with a guild, healer hut, and other places to settle in or get quests from. You can gain levels by doing quests, defeating bosses, or defeating other players. Getting defeated will later lead to you being revived by the system. Skills don't all fall under a species category, most do, but not all, and the system is constantly making new skills.