About: http://webisa.webdatacommons.org/166084303

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Challenge levels separate from the main game open up as levels are completed, such as ones that task you wish surviving against a never ending horde of monsters, or destroying 100 arches in a limited time.
http://www.w3.org/ns/prov#wasQuotedFrom	mobygames.com