L'Abbaye des Morts (The Abbey of the Dead) is a 2D platformer made by LocoMalito and Gryzor87 in 2010. Since its original Windows release, it has been ported to many platforms such as the Wii, ZX Spectrum, C64, 3DS, and NES.
The game's official plot synopsis follows: "In the 13th century, the Cathars, clerics who preached about the poverty of Christ and defended life without material aspirations, were treated as heretics by the Catholic Church and expelled out of the Languedoc region in France. One of them, called Jean Raymond, found an old church in which to hide from crusaders, not knowing that beneath its ruins lay buried an ancient evil." Players take control of Jean Raymond, who can do no more than walk, crawl, and jump, as he explores the old church, discovering its terrible secrets the deeper he goes.
LoganTheTASer and Alyosha complete the NES port developed by Parisoft Games, improving on the previous run by 00:03.328
You can get the game here.