Spelunky

Frogs… frogs are evil in Spelunky. We don't like them.

Spelunky draws heavily from La-Mulana and Spelunker for its visual styling, character design, gameplay elements and general mechanics. Essentially a dungeon crawl, it also adds elements from the roguelike genre, including randomly generated levels, a lack of save points, frequent and easy death, and discovery mechanics. It draws equally from the 2D platformer genre, including real-time interactions with enemies.