What is "spelunky"

Spelunky is an open source indie platform video game created by Derek Yu and released as freeware for Microsoft Windows. It was remade for the Xbox 360 in 2012, with ports to the PlayStation 3, PlayStation Vita and then back to Microsoft Windows. The player controls a spelunker who explores a series of caves while collecting treasure, saving damsels, fighting enemies and dodging traps. The caves are procedurally generated, making each run through the game unique. Spelunky is one of the first examples of a roguelike-like, borrowing concepts from the roguelike genre, and was the influence for many later roguelike-like games.

The first public release was on December 21, 2008. The source code of the 2008 Windows version was released on December 25, 2009. An enhanced version for Xbox Live Arcade was released on July 4, 2012. The enhanced edition was also released on PC on August 8, 2013 and for PlayStation 3 on August 27 and 28, 2013 and for PlayStation 4 on October 7, 2014. A Chrome OS version of the game was made as well, titled Spelunky HTML5