In this way, BBS door games were similar to interactive fiction of the 1980s or 'social games' popular today on platforms like Facebook and iOS. Because of low bandwidth, most door games could offer only simple text graphics, and instead emphasized gameplay and social interaction.Because users accessed a BBS by phone, they tended to call BBSes within their own area code in order to avoid long-distance charges. Door games were usually local and highly social.Most door games took a turn-based approach, where multiple players each had a set number of turns available each day. Because most BBSes had only one phone line, door games tended to be asynchronous : multiple players could not play a game together in real time.The reliance on telephone technology resulted in some characteristics of door games: Board- and card-style games such as Global War and Global Backgammon.Role playing games such as Legend of the Red Dragon, Arrowbridge and Assassin.Strategy games such as TradeWars 2002, Solar Realms Elite, Space Dynasty, and Barren Realms Elite.
