Software has multiple endings, depending on player's choices. Player can choose to spare or kill monsters they encounter. For example, protagonist’s sprite changes depending on their emotional state. Despite simplistic graphics, Undertale game for free is full of small details that give world life. Colours are bright and cheerful, which contrast with dark and foreboding setting of Underground. Pixel art style is reminiscent of early console RPGs, such as Super Nintendo Entertainment System. Backgrounds are well-designed, overall art style gives game a unique look. Visuals are colorful and cute, character sprites are well-detailed. Environments are well-designed, they are varied and interesting to explore. Visuals are colorful and cute, sprites are well-animated. Art style is unique and charming, Undertale for free download is a 2D video game with retro-style graphics. Software is presented in a top-down view. Product has a unique combat system that allows player to avoid violence. Player controls a child who must find their way back to surface. Product has been well-received by critics, with many praising its writing, characters, gameplay. Software first released on Microsoft Windows and Mac OS X in September 2015, later on Linux in July 2016. Undertale is a video game that was developed and published by indie developer Toby Fox.