For those that have never heard of YoYo Games/GameMaker Studio:
About GameMaker: Studio
GameMaker: Studio caters to entry-level novices and seasoned game development professionals equally, allowing them to create cross-platform games in record time and at a fraction of the cost. GameMaker: Studio is the world's most popular 2D game development framework with approximately two million annual downloads and more than 1 million monthly active developers. Hit games created using GameMaker include "Gunpoint," "Home," "Hotline Miami," "Hyper Light Drifter," "Niddhog," "Nuclear Throne," "Spelunky," "Risk of Rain," and "Super Crate Box" among many others. For more information about games created using GameMaker: Studio, please visit our Games Showcase at http://www.yoyogames.com/showcase
