  Dungeon Crawl Stone Soup is a popular, single-player, free and open-source
rogue-like video game with a sufficiently complex decision space that makes it
an ideal testbed for research in cognitive systems and, more generally,
artificial intelligence. This paper describes the properties of Dungeon Crawl
Stone Soup that are conducive to evaluating new approaches of AI systems. We
also highlight an ongoing effort to build an API for AI researchers in the
spirit of recent game APIs such as MALMO, ELF, and the Starcraft II API.
Dungeon Crawl Stone Soup's complexity offers significant opportunities for
evaluating AI and cognitive systems, including human user studies. In this
paper we provide (1) a description of the state space of Dungeon Crawl Stone
Soup, (2) a description of the components for our API, and (3) the potential
benefits of evaluating AI agents in the Dungeon Crawl Stone Soup video game.
