The new Simultaneous-Sequential-Play-System (SSPS) allowed for much greater realism without sacrificing playability, and was considered the new "state of the art" for tactical wargames. The first era of tactical wargaming had come to an end. The new state of the art was extended to Avalon Hill's "Tobruk" in 1976, as well as SPI's "Firefight". But neither game did well, with increased realism in the form of detailed penetration tables in "Tobruk" and rigid rules for modern Soviet doctrine forced on the players of "Firefight" making games once again less playable. "Tobruk" also suffered from an unattractive map surface which depicted basically flat terrain.