The game was brought down on June 30th, 2015. Feel free to browse the wikia at what was.
To Whom It May Concern:
As of August 8, 2019, the DoS wiki will be locked for editing, except by special request. This is to preserve the original design of this wonderful site, which for its time was ahead of the curve with regards to coding. You will still be able to view everything, and if you find any existing problems please report them to me. I hope you understand the reasoning behind this decision, which I worked out with Community Central. Perhaps, Sony will someday revive DoS in some form, even just as a combined format with other games, with which it was partnered in the past and which may still be active. Remember, I am just a message away if you need me. Thank you, Kwismaskiller