Digimon World 3 (デジモンワールド3, Dejimon Wārudo 3), also known as Digimon World 2003 in Europe and Australia, due to the second game not being available for those regions, is a role-playing video game created by Bandai for the PlayStation. The series is the third installment in the Digimon World series and it was first released on June 5, 2002 in the US and then on July 4, 2002 in Japan and November 15, 2002 in Europe. You play as a child called Junior who enters an online virtual reality MMORPG called "Digimon Online", which is run by the "MAGAMI" corporation. A terrorist attack on the Internet traps Junior and his friends inside the game and he sets out to stop them with his Digimon partners.
Unlike past Digimon World games, battles against wild Digimon are random and the battle system although turn-based is very different from Digimon World 2, the most notable distinction is battles are one on one instead of three on three although you may tag in a different Digimon, battles also feature three types of digivolution; normal, Blast, and DNA digivolution.
Junior, and his friends Ivy and Teddy, log-in to "Digimon Online", where Ivy renames herself "Kail". Soon after Junior arrives, the players are trapped in the game by an error in the system. MAGAMI's "Game Master" publicly assures the players that the situation is under control, and blames the incident on the hacker, Lucky Mouse. Junior proceeds with his adventure as normal and travels to the A.o.A. controlled West Sector, and after defeating the real leader, travels to a secret base of Lucky Mouse, who reveals himself to be Kail's long-lost brother and an agent working against the A.o.A., Kurt, who reveals that MAGAMI is a front for the A.o.A., but soon the A.o.A. arrive and threaten to turn Kail into Oinkmon, if Kurt doesn't give the Vemmon Digi-Egg to the A.o.A. This results in Kurt being turned into Oinkmon and the Vemmon Digi-Egg stolen. Junior leads an attack on the Admin Center, which results in the Game Master being defeated and interrogated. Junior uses a network break to transport himself to the Amaterasu Server, where he defeats two of the A.o.A.'s chiefs and learns more about their plans. He returns to Asuka, defeats the fourth leader, and uses an emergency teleport system to reach MAGASTA, but is unable to prevent the Juggernaut from being unleashed. The Juggernaut is then used by Vemmon to digivolve to Destromon.