DISCLAIMER: Characters, places, and objects are trademarks of Sega, Sonic Team, and/or Sonic Project.

Author's Note:
Here's the reason why you're here: The appearance of the Black Arms in "Sonic X"! Of course, it's recommended that you play Shadow's self-titled game before reading this fic so that you won't get too confused. But there are a few differences in this fic you should know about. First of all, the original game has you following different paths based on whether you want to be a hero, villain, or neither, but the last story would be the true ending. So, to end up there, I'm mixing some of the paths together and leaving some out. Second, in the game, Shadow can use guns as a part of the game play. However, I'm dropping that ability so that the only characters who can wield guns are the military, Eggman's robots, and the aliens known as the Black Arms. Third, since this is a "Sonic X" adaptation of the game, there will be "Sonic X" characters involved in the plot. (Don't blast me, Chris haters.) Now then, on with the alien invasion!

Chapter 1 - The Time Has Come...

The red clouds hover over the city's buildings. Suddenly, the clouds open a hole over some of the buildings and a ton of black aliens fall out of the hole, feet-first. Some other black aliens have wings and just fly out of the hole. Shadow watches on from under the tree, worriedly.

"Those aliens are attacking the city!" he cries out.

Mysterious voice tells him, "Yes, a lovely sight, isn't it?"

Shadow gasps in surprise upon hearing this voice.

"Who said that?" he asks.

He then notices a six-tentacled black alien with a red eye in the middle "swim" toward him. Then, the eye projects a hologram of a big black alien in front of him. This alien has a small head, two horns with each one sticking out each side of his head, ten tiny horns on top of his head, three red eyes (That's right, three eyes.), and three fingers on each hand. He wears a long, black shirt that cover his feet. (If he has any feet.) His shirt has a gold collar, gold shoulder pads, and gold cuffs on the sleeves. His shirt also has silver metallic chains with strangely shaped charms on them. The eye projecting the hologram belongs to him as does the mysterious voice that spoke to Shadow earlier.

The alien introduces himself, "I am Black Doom, leader of the Black Arms. As you can see, the promised time will soon be here."

"Promised time? What promise?" Shadow wonders.

Black Doom explains, "We must gather the seven Chaos Emeralds in order to begin the ritual."

Shadow angrily shakes his fist at Black Doom and proclaims, "Not if I can help it."

Black Doom just chuckles at Shadow's threat.

"You are in no position to challenge us, Shadow the Hedgehog," he responds.

Shadow gasps in shock the moment Black Doom mentions his name.

"How do you know my name?" Shadow demands.

Black Doom tells him, "All will be revealed in time."

Then, the hologram fades and Black Doom's eye rushes away from Shadow. He reaches his hand toward the eye and starts to follow it, but some blasts from the sky stop him and makes him shield himself. Shadow recovers and looks at the city.

"Just what was that all about?" Shadow ponders. "If he knows who I am, then, like it or not, I have to believe him. The only way to know for sure," he becomes determined as he clenches his fist, "is to get those Chaos Emeralds. ... before anybody else!"

Shadow rushes into the city. He comes across a group of regular Black Arms known as Black Warriors that are blocking the street. Shadow doesn't stop as he uses a Chaos Spear on each trio or quartet of Black Warriors, knocking them out of the way of his path. Shadow then gasps in surprise as he notices something ahead. He frowns in determination as he heads toward that something... or more likely, someone: Topaz and Rouge are fighting these black aliens, too. Topaz wears her combat outfit as she shoots down the bat-like aliens, the Black Hawks, with her laser pistol. Rouge knocks down some Black Warriors with her devastating kicks. Shadow stands beside her as soon as she lands.

"I see you've got the 'message', Shadow jokes.

Rouge looks at him and teasingly asks, "Friends of yours, Shadow?"

"Hmph! Hardly," Shadow replies, maintaining his grim attitude. "But their leader seems to know me for some reason."

Topaz goes to Shadow and Rouge with her back toward them, keeping her pistol close.

"Any idea what they want?" Topaz asks Shadow.

"The leader, Black Doom, said they needed the Chaos Emeralds for some sort of ritual," he explains to the girls. "It has something to do with this 'promised time'."

"Ritual?" wonders Rouge.

"Promised time?" Topaz wonders.

"Believe me, I'm just as confused as you are," Shadow admits. "I'm even more surprised that Black Doom knows who I am. Perhaps, he knows something about my past. And I intend to get some answers."

"I don't know. These aliens can be pretty tricky," Rouge responds, skeptical.

"Be careful, they're not to be trusted," Topaz warns Shadow.

"I know what I'm doing," Shadow reassures the girls.

He jumps up toward some incoming Black Hawks. He punches and kicks them out of the way. Rouge and Topaz look on in awe. Shadow lands in front of them with his back turned toward them. Rouge and Topaz rush over to him as he stands up. Suddenly, all three of them gasp in shock as a group of Black Warriors and muscular black aliens, Black Oaks, come toward them, surrounding them.

Topaz points out, "There's too many of them!"

Shadow just becomes determined as he walks toward the aliens in front of them. He stands still.

"Rouge, take Topaz away from here," Shadow instructs.

"Why? What are you gonna do?" Rouge asks him.

"No time to explain. Just do it," Shadow demands.

Rouge shrugs, "Okay."

She holds Topaz as if to hug her and flies her off the ground, high above Shadow and the aliens surrounding him. He starts glowing red as he angrily growls and brings his fists up to his chest.

He starts out, "Chaos..." Then, he quickly brings his fists down, tilts his head back, and closes his eyes as he shouts out, "...Blast!"

Upon these words, the red glow expands out into a red dome of light covering the Black Warriors and Black Oaks, destroying them. Rouge and Topaz gasp in shock upon seeing this as they hover over the scene. As the light fades, Shadow stands with his arms folded. Rouge brings Topaz down to him, both girls still surprised.

Topaz remarks as Rouge lets go of her, "That was amazing, Shadow!"

"When did you learn to do that?" Rouge asks Shadow.

"I wish I knew. This is the first time I ever did that attack," Shadow admits. I'm not even sure how I knew it."

Rouge smiles, "Well, it sure comes in handy."

"So, now what?" Topaz wonders.

Shadow tells the girls, "We'll just have to keep fighting."

Suddenly, he and the girls gasp in surprise as a shadow of a giant stingray comes over them. They look up and see a black spaceship shaped like a stingray flying over the city. The ship spouts a green rocket fire out of its back. Shadow, Rouge, and Topaz watch this from the street below. Then, Shadow senses something within the ship.

"There's a Chaos Emerald within that ship. I can feel it," he explains.

Rouge and Topaz look at Shadow.

"Are you sure?" Topaz asks him.

"There's no doubt about it," Shadow responds. "The emerald has to be there."

He, Rouge, and Topaz watch the ship fly away from them.

Shadow exclaims, "I'm going after it. I need those emeralds if I want to uncover the secrets of my past."

Rouge and Topaz worriedly watch Shadow go after the ship.

"Secrets of his past?" wonders Topaz.

"Shadow has amnesia," Rouge reminds Topaz. "He thinks the Chaos Emeralds can cure him of that. ...somehow."

Shadow chases after the ship as it hovers through the empty damage-ridden streets. He tosses a Chaos Spear at the ship, but a green sphere of engery deflects it and fades just as quickly.

"That shield protects the ship," Shadow muses. "If I destroy that shield..."

He goes toward a broken highway bridge beside the ship's longer path. He jumps off the edge of the broken bridge and lands in front of the ship as it comes toward him. And, like he did with the Black Warriors and Black Oaks, Shadow glows red and brings his fists up to his chest.

He starts out, "Chaos..." Then, he quickly brings his fists down, tilts his head back, and closes his eyes as he shouts out, "...Blast!"

Upon these words, the red glow expands out into a red dome of light which destroys the green layer of the ship's shield, but not the ship itself. As the light fades, Shadow watches the ship hover over him and down the street.

"I took out the first layer of the shield," he remarks. "Only one more to go."

He rushes down an alley and arrives in front of the ship again as it comes toward him. Once again, he prepares for a Chaos Blast. He glows red and brings his fists up to his chest.

He starts out, "Chaos..." Then, he quickly brings his fists down, tilts his head back, and closes his eyes as he shouts out, "...Blast!"

Upon these words, the red glow expands out into a red dome of light which destroys the light blue layer of the ship's shield, but not the ship itself. As the light fades, Shadow watches the ship hover over him and down the street.

"That's got it. Now, to finish the job."

He chases after the ship and shoots a Chaos Spear at the ship, damaging it. He shoots another Chaos Spear at the ship and it takes more damage as the smoke from the damage rises up out of the ship. Shadow hurls one more Chaos Spear at the ship and it starts to let out eletrical sparks. Shadow stands and watches the ship as the sparks cause the ship to explode. Then, he looks up as a green light comes falling toward him. As it comes closer, the green light is revealed to be the green Chaos Emerald. Shadow catches the emerald before it lands on the ground. He looks at it as it glows in his hand.

"There's one emerald," he remarks. "I must get the other six before they do." He closes his eyes as he points out, "This emerald will lead me to the next."

The Chaos Emerald glows brightly in his hand. He then Chaos Controls out of Station Square. Doom's Eye floats above the scene, noticing Shadow's Chaos Control.

"Yes, that's right, Shadow," says Doom's Eye. "Gather the Chaos Emeralds for us."

A/N:
Ooh. Black Doom is using Shadow and he doesn't even know it. Will he figure it out before it's too late? 'Til next chapter.