The Story and Idea was created by Jeff Marcoux: A long time ago there was only a single empire that existed in the continent. The land experienced tranquility and peace and did not know the concept of war or illness. The people of this continent lived happily together. Their fate began to change as a huge stone descended from the sky; this stone was known as the Metin stone. The Metin stone began transforming animals into monsters, its very presence creating deadly diseases that spread around the world. Innocent people suffered as those who were slain by these beasts or choked to death by disease later rose again as undead. The undead caused chaos and destruction in their wake with seemingly endless numbers. Their tireless existence appeared as if this problem was not going to go away. Eventually the single empire collapsed and became three different kingdoms, all fighting for their own survival. To this very day, they still treat each other as enemies.

The falling of the Metin Stone was just the beginning of what was yet to come. Smaller stones continued to fall from time to time, and all three Kingdoms lived in fear. None would dare approach the Metin Stones because the most terrifying creatures roam around here. Recently, it was discovered that the power of the Metin Stone was growing and people felt that it was consuming energy from the world. It is believed that these incidents caused the Dragon God to appear on the continent and people hoped that he would restore their lands to a peaceful state again.

When attacking in Metin 2, the enemies come in mobs of 3 or more. On some occasions, there are only 1 mob of 1 person/creature, most of the time being a boss. This makes the game more challenging because of the number offset. Each enemy`s difficulty is listed next to their name in the format stating their level and level of difficulty. For example a wild dog would be seen as a Level 1 (lvl 1). Whereas a white oath soldier would be seen as a Level 2 (lvl 2). The difficulty ranges from 1 (easiest) to 5 (hardest). Only metins and bosses may be seen with the (lvl 5) rank in their name and "mini-bosses" are categorized under (lvl 4). In the U.S. version of the game there is no (lvl 1–5) rather, it is classified like chess and uses terms such as, Pawn, Knight, High Knight, and King are used.

In Metin 2, the currency used is Yang (Gold in the US version). Unlike many MMORPG`s, the economy for Metin 2 is very stable and yang is often the primary way to conduct trades. Players can make Yang by killing monsters and gathering the Yang, or by selling items for Yang. One can choose to sell an item to an NPC vendor or they can purchase a shop bundle from the Shopkeeper for 500 Yang and create their own shop with their own prices. Often the latter option is most preferred by players.

PvP in Metin 2 is available once a character reaches level 15. There are 3 ways to battle other people. The first is to challenge a person to a duel by right-clicking the desired opponent and selecting the "Duel" option. This is the most common way and in the case of death, no experience is lost. The second way is to fight a player from different kingdoms. This way requires not requesting a fight as kingdoms are preset to hostile to each other. In the case of death, experience can be lost. The third way is to activate the "free" option under the game play menu. This allows you to attack and be attacked by any player regardless of kingdom or consent. Experience can be lost this way and rank points are lost when in this mode. If you lose too many rank points, you will turn "cruel" and have negative points which leads to lower drop rates and distrust by other players. At level 50 or above, Cruel ethos (title) players have a chance to drop items.