Petri Purho (born 1983 in Kouvola, Finland) is a Finnish computing science student and rapid game prototyper. He has worked at Finnish independent video game developer studio Frozenbyte. Almost all of Petri Purho's games are created within one week as a massive prototyping project. Most common element of all games are various bonuses for successful combos and/or chain reactions. His games are created using open-source technologies.