during the quakecon 2008 keynote speech, john carmack stated that "quake live" has no plans to allow user-made modifications, but they have hired successful "quake iii" mod authors to help them with their project. a large number of the maps are based heavily on originals from "quake iii arena", "team arena" and popular user-made maps. newer map additions even include maps from previous "quake" titles, such as 'the edge', which is almost identical to the famous "quake ii" map q2dm1.