Spelunky is an action adventure game centered around the exploration of a series of caves while collecting treasure, saving damsels in distress, and dodging traps. Spelunky draws heavily from La Mulana and Spelunker for its visual styling, character design, gameplay elements and general mechanics, and adds elements from the roguelike genre, using randomly-generated levels, being a dungeon crawl, lacking any savepoints, having frequent and easy deaths, and having discovery mechanics. It draws equally from the 2D platformer genre, including real-time interactions with enemies. Version 1.0 was released on 1 September 2009, along with confirmation that the game would be coming to Xbox Live Arcade. The source code was released on December 25, 2009, along with Version 1.1.
After the game code was open-sourced, the community made several variations. The major ones include Black and White Spelunky, Tastes Like Spelunky. Shopkeeper Spelunky, Basketball Spelunky, Spelunky Potion Mode, and Crowded Spelunky.