"Legends speak of a Colossal Cave that extends deep underground, so twisted by time that its passages shift like the sand under which it lies... the Cave is said to be filled with fabulous treasures, but also incredible danger!" -Spelunky Classic synopsis
Spelunky Classic is the first game in the Spelunky series created by developer Derek Yu.
The original Spelunky was created in the Game Maker engine. The first public release was on the 21st of December 2008 for Windows.
The PC game is Freeware, being available for download on the official Spelunky site, Spelunky World.
Being written in Game Maker confers advantages and disadvantages common to other Game Maker games.
As of the latest release, V1.1, the full source code is now available, allowing modding to be done by anyone with a registered copy of GameMaker 8. As a result, there are now many Mods available for the PC version.
The game was created using Game Maker Studio and is open source freeware available to download on the official Spelunky World website.