Inside is a puzzle-platform game developed and published by Playdead in 2016 and was released on June 29 for Xbox One Windows on July 7 and August 23 for PlayStation 4. The game was released for iOS in December 2017 and Nintendo Switch in June 2018. A macOS version was released in June 2020. The player controls a boy in a dystopic world solving environmental puzzles and avoiding death. It is the successor to Playdead's 2010 Limbo with similar 2.5D gameplay. Playdead began work on Inside shortly after the release of Limbo using Limbo's custom game engine. The team switched to Unity to simplify development adding their own rendering routines later released as open source to create a signature look. The game was partially funded by a grant from the Danish Film Institute. Inside premiered at Microsoft's E3 2014 conference with a planned release in 2015 but was delayed to 2016.