A single large interconnected world with different areas within it, which the player can explore. Access to certain areas is limited by obstacles. This requires the player to beat a boss, collect an item, a tool, a weapon, a power or an ability in order to progress. These maps are non-linear and often require the player to traverse the map multiple times during the course of the game and go back to earlier areas because they've become stronger and can interact with the world differently with new abilities.