Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : Dungeon Crawl Stone Soup is a free and open source roguelike computer game, which is the actively community-developed successor of the 1997 roguelike game Linley's Dungeon Crawl, originally programmed by Linley Henzell.
Answer : Linley's Dungeon Crawl
A:
Which is the basis of Dungeon Crawl Stone Soup?