A/N: Thanks to those who reviewed, especially Zack Anderson. In response to that review, that first person thing is just something I'll put in at certain points in the fanfic, and there will be dialogue in the other parts. I like the idea of the flashback chapters, and have already thought of a point in the fanfic where I can put the one you suggested. Now, I realised that I didn't put in a disclaimer in the previous chapter, so here it is.

Disclaimer: I don't own Sonic the Hedgehog or any related characters, games, etc. They are the property of Sega and Sonic Team.

Warning: This chapter starts with a scene that is considerably more gruesome than your standard Sonic the Hedgehog stuff. If you do not wish to read it, simply skip down to the next section (indicated by a line of dashes).

Chapter 1: Enter Sonic

The scream echoed through the alley and dissipated out into the street. In this part of town, no one paid it any mind: it was a common occurrence. It was a corner of Station Square where few dared to tread, a corner where the law meant nothing. But few around that night realised that what was going on in that back alley wasn't as normal as it seemed. For the scream came not from a human, but from a chao.

Suddenly, the screaming stopped, and the sobbing began. The chao now lay in a bloody heap in a trashcan at the end of the alley. A menacing silhouette glared at the chao.

"Serves you right for losing, you useless piece of shit," said the figure, who, judging by his gruff voice, was clearly a man. Little did the man know that he was being watched. As the man turned to leave the alley, he saw what was undoubtedly the weirdest thing he'd ever seen. Standing between him and the street was six-foot tall, humanoid figure. All the man could really see of this figure were two green eyes and its brain (needless to say, that crept him out). The rest seemed to be almost clear.

"Whoa, you don't see many people with multi-million dollar costumes around here. Halloween's already past, bud." The figure didn't respond. It merely raised its arm (or what appeared to be its arm). Suddenly, the arm shot out and impaled the man's chest. Now he was screaming. Then he screamed harder as his chest began to rot away. The gaping hole in his chest expanded, consuming his body until there was nothing left. The figure then returned its arm to its original position. It walked over to the trashcan, but it was too late: the chao was already in a grey cocoon. The figure watched in silence as the cocoon slowly faded away, leaving nothing, no sign that the chao had ever existed. The figure turned away: the sight was like poison to him. He collapsed into a puddle-like form and seeped away from the alley and down into the sewers.

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It was night time at Station Square: the time for a bit of rest and relaxation. Some people went home, some went to the casino, some went to Twinkle Park and some people just stood around and looked at the stars. There was one who didn't do any of these things though. In fact, what he was doing wouldn't be called relaxation at all by most people.

A blue blur zipped along the rooftops of Station Square. One would be forgiven for thinking that it was a laser. In actuality it was Sonic the Hedgehog. He had just come back from vacation and was doing what he loved most: performing death-defying stunts at ridiculously high speeds.

Sonic screeched to a halt just in time to avoid falling off the roof of the train station. It was good to be back.

"Yeah, this is happening," he said, pleased with himself. A wailing siren snapped him out of his pride-induced state. "What's that?" he said to himself. Looking down, he saw half a dozen police cars tearing down the road towards city hall. He knew it had to be serious, as it was rare to ever have police cars using their sirens in Station Square. "Better check it out," he thought as he dashed towards city hall.

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By the time Sonic got there, the police were already in retreat. It was easy to see why. They had just emptied an entire payload of bullets into this creature, and it wasn't even fazed. The creature looked like it was made of water, and it was possible to look right through it. Sonic could even see what he supposed was its brain. He had never seen anything like it.

"Hey, this might be fun," he said as he dropped down to confront the strange creature. The creature shot its arm out, but hit nothing. It had no time to react before the spiny blue ball that was Sonic slammed right into its head. It literally splattered, leaving nothing but a puddle.

"Is that all you've got?" Sonic mocked. The next instant he was face-down on the floor. The creature had reformed, and was about to land on top of him. Sonic quickly rolled out of the way and launched another attack of his own. The creature splattered again, but Sonic was ready this time, grabbing hold of a nearby flagpole and swinging on it to gather speed. Then, just as the creature reformed, Sonic let go of the pole and launched himself at the creature at an incredible speed. The creature dodged and Sonic couldn't stop fast enough, causing him to run right up the wall of City Hall. He then launched himself off the wall soaring to a height of over 50 metres.

As he looked down at the ground, he saw that the creature had somehow climbed up to the top of the flagpole. Suddenly, it shot both of its arms out. Sonic dodged them, then as the creature aimed for another strike, he curled up into a ball and launched himself at the creature. The creature struck Sonic with both of his arms, but they simply slipped off, unable to get a grip on the hedgehog who was rapidly approaching. Sonic hit the creature at nearly the speed of sound, sending it off the flagpole and slamming them both into the ground. When the dust had settled, there was a large crater where the pavement used to be. Sonic slowly climbed out as his senses returned to him. Then he saw the creature in its puddle form. He couldn't believe it, that blow would have killed anyone else. The puddle slowly crept away towards a drain.

"Hey come back here, you big drip!" he yelled as the creature seeped down into the sewers. "What the hell was that thing anyway?" Sonic thought as he walked over to where the police officers were just coming out of their hiding spots.

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If Sonic had though to look back, he would have seen a large, egg-like silhouette standing on the top of City Hall. It was the figure of Dr Robotnik.

When the police left the area, he shouted at the top of his lungs, "Fool! It is Chaos, God of Destruction!" Robotnik had now seen the incredible power that Chaos possessed. Even in its most basic form, it was able to put up a decent fight against Sonic, even if it was only for a short time. He couldn't wait to see its final form. Chaos would then be invincible, and obey him. He started laughing to himself, quietly at first, then picking up in volume, until finally it reached a volume so loud that it filled the air as much as his silhouette filled the sky. "MWAHAHAHAHAHAHAHAHA!"