Crossfire’s development history started in mid-1992. It originally started as a Gauntlet clone developed by Frank Tore Johansen at the University of Oslo, Norway.
Crossfire started with just one indoor map (first a simple test-map, then the first real map, which got extended a few times) and then increased to 4 indoor-maps with one-way portals from level 1 to level 4. Upon clearing the last level, there was nothing more for the player to do. Spells were limited to magic bullet (the first spell), fireball, magic missile, burning hands and lightning bolt. Later on, when two-way portals were implemented, development and content contribution took off in all directions.
Later, when two-way portals was implemented, and lots of local players (at University of Oslo, Norway) started making maps, it exploded in all direction, including the first town and the first world (the one we have now is the third town and third world).
In the years of development that have followed, Crossfire has grown to encompass over 150 monsters, ~3000 maps to explore, an elaborate magic system, over 15 character types, a system of skills, and many, many artifacts and treasures.
What is generally accepted by the inhabitants of the crossfire world as truth.
We are currently in 8437 Era Khelentari (EK). Some information can be found in guides