1. Blue Byte. 1993. The Settlers. Blue Byte.
2. Bullfrog Productions. 1989. Populous. Electronic Arts.
3. Crytivo Interactive. n.d. The Universim. (Forthcoming)
4. Drover, Glenn. 2002. Sid Meier's Civilization: The Boardgame. Eagle-Gryphon Games.
5. Eisenack, Klaus, and Gerhard Petschel-Held. 2004. Keep Cool. Spieltrieb.