Pie in the Sky is a 2.5D and 3D first-person shooter engine most popular in the mid-to-late 1990s by Pie in the Sky Software, also known as Power 3D and the 3D Game Creation or 3D Game Creation System engine. The engine was used in two games by the company as well as many other independent games and amateur projects after it was turned into a commercial game creator,[1] largely because it minimized the amount of computer programming knowledge needed to make 3D games in its editing tools, making it suitable even for beginners with no game-design experience.[2][3]