I have been playing a sub-mod called the second age, This is the story of Arnor if the last alliance had not been forged.
Chapter 1: The First of Many Betrayals
Isildur stood with his swordsmen at the gates of fornost and saw the slaughter that stood before them, twelve thousand orcs fallen and nearly one thousand humans dead. Isildur had won the day but at a high price. Fornost was destroyed, his father Elendil was crushed by a troll's club. These trolls were a new devilry of Sauron the betrayer. Twelve feet tall covered in muscle and a thick hide, with the strength of 30 men. These beasts were tough to beat but for now at least they were few in number. Isildur was nearing 130 years old and yet he looked like a mere teenager to the average human. Even with his diminished blood he and his kin could live to be over 400 years old. His Father had been 300 when he died at Fornost. With the death of his father, Isildur now Was high King of Arnor and of Gondor to the South East.
Sauron had taken mirkwood and the misty mountains which were now filled with orcs of mordor. Rhovanian was destroyed fifty years prior and Arnor now governed that land. The dwarves still hold the halls of Dain, and of their new palace at khazad-dum. The orcs of the misty mountains were replaced by the orcs of mordor. The final war is coming. The day when Humanity would destroy Sauron and take its place as the dominant race of middle earth. The high elves still remained in the grey havens and were protected by the ally that surrounded them, Arnor. Soon the elves would all leave middle earth and Humans would take up the lands that the elves left behind.
Chapter 2: The Dream
In a better world the elves would have tried to help destroy Sauron and save middle earth, but they were too cowardly, they hid behind their ally and slowly left middle earth to its fate. Arnor was alone, fighting a war which would consume middle earth. If arnor could unite the strength of the remaining peoples of middle earth. If it could rally the cause of freedom and hope, then they would be victorious and Sauron would be slain, but it could not. Isildur knew that arnor stood alone against the tide. He would die defending it, the last bastion of good in a world controlled by evil. Arnor was strong but orcs poured from mordor like the wave that destroyed numenor to the west.
Isildur saw a land where green grass flowed into mountains, and the air was clear. Then like a crashing, thundering storm a fire burned across the beautiful valley and all was turned to black and grey. Isildur awoke, screaming for his sword and armor. He assembled his army. He knew what the dream meant. He rode quickly to the lands of the high elves and went to their king Hadrion son of the great king Gildron who died in a battle with the goblins. He shouted and in his passionate rage he yelled "You would leave us to die so that you could slip away! You would run when we need you the most! If we unite we will be victorious but you run! Join us! Join us and together we will bring a new future brighter than the stars at night! more promising then spring after winter! Join us and free this world of the greatest evil since Melkor which we defeated together long ago!"
But the coward refused, and in his rage Isildur cut down the fool and yelled to the elves "Stand with us and restore your honor", it started as a whisper then grew to a yell than finally it elevated into a Battle cry in all corners of the lands of the elves the cry was heard, a cry for war, a cry for battle! The elves were going to war. They would restore the honor of their' people and destroy the usurper Sauron who tainted all lands that he touched.
The cry spread across Arnor "Gather Arms, We March to Mordor!". Every man and woman of arnor did so. A force of over one hundred thousand Arnorian's marched. They would destroy mordor or they would all perish in the greatest battle since the fall of morgoth. Idildur led the army. A smile on his face. He could see the future, bright and undying.
Chapter 3: The Fall
Even with all their strength gathered mordor still outnumbered them 8 to 1. Millions of orcs and goblins and trolls poured from mordor. The men of Arnor cut a bloody swathe to the gates of mordor. There they camped and on the sunrise of the next day the horn of the elves was heard. The elves were magnificent 20,000 strong and clad in golden and bronze armor. The armies of mordor then showed their ugly faces. Orcs and Trolls, too many to count, hope was almost lost, the men were about to flee.
But then Isildur screamed "STAY YOUR POSTS" "THESE ORCS ARE NOTHING COMPARED TO OUR COURAGE AND SKILL!" "STAND AND FIGHT!" The battle after was long and fierce, thousands of men and elves died, the alliance of elves and men pushed into the heart of mordor and there sauron halted them. He stood eight foot tall in black armor carrying a black mace. He bludgeoned through the line until isildur stepped up to him. Isildur fought like a man possessed, Sauron was so taken back by the Fierceness that he picked up an orc shield. Isildur then cut his leg clean off and then brought his sword down on his head. As sauron disentigrated away isildur noticed the ring on his finger. It was sauron's power ring which Isildur knew would have to be destroyed. But isildur heard it calling "take me and i will give you strength greater than any elf-king" Isildur felt his heart go icy cold.