Xevious was one of the earliest vertical scrolling shooters, and greatly influenced games in this genre. The graphics were revolutionary for their time, and characters were rendered with remarkable clarity and effect through careful use of shades of gray and palette-shifting. It was one of the first games to have hidden bonuses which are not mentioned in the instructions but can be revealed by a secret maneuver. Among these was the 'special flag' which first appeared in Rally-X. In this game the flag gave the player an extra life and this feature was carried over to numerous subsequent Namco games. In 1983, the original Xevious was the first arcade game to actually have a television commercial aired for it in the U.S. Atari promoted the game with the slogan "Are you devious enough to beat Xevious?" and closed the commercial with a tagline branding it "the arcade game you can't play at home." (Note: the name is actually pronounced "ZEH-vee-us")