* [http://www.cpcwiki.eu/index.php/File:AmstradComputerUser14-0186_page_0098.jpg Amstrad Computer User Jan 1986 Page 82]
* [http://java.cpc-live.com/game.php?id=-D-&title=doppleganger Java CPC]
* [http://www.genesis8bit.fr/amstrad/game-rom/amstrad-game.php?prog_id=1433&title=Doppleganger&creator=Alligata Genesis 8Bit]
* [http://www.video-games-museum.com/en/game/Doppleganger/38/3/11879 Video Games Museum]
== Download ==
* [http://tacgr.emuunlim.com/downloads/filedetail.php?recid=259 The Amstrad CPC Games Resource]