Air Warrior was an early multiplayer online air-combat simulator introduced in 1986 by Kesmai.
The game was played over modems and hosted on the GEnie online service. Players could choose a number of World War II aircraft to fly, along with a small number of ground vehicles. The game was played in a multiplayer online "arena" with hundreds of other players. Solo play options were also offered, along with World War I and Korean War aircraft. The game focused mostly on dogfighting, with a secondary strategic objective of capturing forward airbases near the center of the map.
The original version of Air Warrior ran on the Apple Macintosh, Commodore Amiga, and Atari ST computers. It had simple black and white wireframe graphics, and cost over $10/hour to play. Over time, Kesmai produced improved versions of the game, starting with SVGA Air Warrior in 1993, and continuing with Air Warrior for Windows in 1996, Air Warrior II in early 1997, Air Warrior III later in 1997, and finally Air Warrior III Millennium Version in 2000.
Source: Wikipedia, "Air Warrior", available under the CC-BY-SA License.