How Does The Game Work?
The game takes place in a fantasy world during the Middle Ages. You can do anything on RuneScape; you can decorate your house to raise your construction level or even kill a dragon to raise combat stats.
Though appearing to take place in the Middle Ages, RuneScape also has a fantasy feel to it due to gaming attributes like teleportation and magic as well as some weapons having special attack abilities.
The game throws in a few futuristic aspects such as having a gigantic market place for all players to buy and sell items to eachother instantly which is known as the Grand Exchange or GE:
The game works using a combat system with 3 main types of combat: Range, Magic, and Melee. Additionally, there are a plethora of skills (a skill is defined as any stat in Runescape that is
not connected to combat in any way and does not make your combat level increase) that ones can train to increase their experience gained.
They can use these skills to do things like make better weapons, make money, and make runes which allow for magic use among many other things. The skills range anywhere from crafting which allows you to make armor
or staves which can be used for magic, to slayer which allows you to kill bosses or monsters that can drop amazing items.
The complete list of skills are as follows: Cooking, Woodcutting, Fletching, Fishing, Firemaking, Crafting, Smithing, Mining, Herblore, Agility, Thieving, Slayer, Farming, Runecrafting, Hunter, and Construction.
The complete list of combat based stats are as follows: Attack, Defence, Strength, Hitpoints, Magic, Range, and Prayer.
One of the most interesting aspects of the game is the Random Number Generator or RNG. The RNG is what dictates almost everything in the game. When you are in combat it is turn based,
one person attacks, and the other attacks back. To defeat a monster or person you would click them and a hit splat would appear: 
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Red indicating it was a hit, blue indiciating it was a miss or a 0. Your hit splat is determined based off of this random number generator, when you click an opponent the internal dice is rolled and your
roll is the hit and appears ontop of the character. Your hit splat is also determined based off of how high your combat based stats are so for example someone with all 99's in combat could hit an 80 on someone
but someone with all 10's in combat stats would only be able to hit a 3-5.