Development of ADOM started on 12 July 1994 and continued steadily until 20 November 2002 (release date of the 1.1.1 version). Some ports to Mac OS appeared in 2006. Unofficial ToGu patch fixing some bugs appeared in 2004. Development seemed to focus on a next-generation successor to ADOM, called JADE (also ADOM II, not to be confused with Adom 2.x.x).
On 2 July 2012 a crowfunding campaign was initiated by Thomas Biskup to resurrect ADOM development. The campaign reached its initial goal of $48,000 on 22 August 2012, 51 days after starting, and finished at $90,169, nearly double the starting goal.