Wikipedia
Darkzone, Laserzone, Megazone, Ultrazone and Zone 3 are a group of laser skirmish sites that use laser tag systems manufactured by P&C Micros of Melbourne, Australia. These systems and sites are sometimes collectively referred to as being a part of the "Zone Empire" and in most cases incorporate the word "Zone" in their name.
The names Darkzone, Zone 3 "Megazone" and Laserzone are more commonly used in Australia while Ultrazone is used in the U.S.. Canada is also known to use the Darkzone name. Not all Zone Empire sites are known by these names, even in these regions; some sites use the Zone equipment and have their own distinctive name.
Zone sites are in the business of providing both recreational and competitive indoor laser games (or laser tag). The games require players to wear vests, or packs that contain a number of infrared sensors, and carry around a laser emitting phasor which activate these sensors and deactivate the hit player's pack and phasor for a period of time. There are many different kinds of game formats, many of which are team-based and played with three teams total. In most cases the games are played in large indoor arenas.
Many Zone sites run weekly leagues in which players of various skill levels compete. Regular leagues are run in Darkzone Perth (WA), Laserzone (QLD), Zone 3 (ACT), Laser Realm (VIC) & Megazone (SA). There are also inter-site competitions, such as a North vs. South competition between the sites based in Western Australia, the two SE Queensland sites and the state competition for the Victorian sites. Once a year there is also an annual National Titles competition between sites from all over Australia and New Zealand. The National Titles has been running since 1999 and has had between 18 and 22 teams attend each year since 2004.