A/N: I decided to make this after scouring the entirety of Fan Fiction for a crossover between SAW and CSI, but I couldn't find one. So, without further ado, I give you my creation. I'm actually really proud of it, and I think it's one of my best stories…I hope I'm not coming across as being over-confident, or bragging!

Chapter One: Instructions

(Grissom)

When he fell asleep that night, he did so in his bed, which wasn't uncommon. When he woke up, however, the first thing Gil Grissom noticed was that he was strapped into a chair. He felt his heart begin to beat faster and tried to keep the fear at bay.

He looked around at his surroundings, feeling like he had been drugged. He appeared to be in a room at some abandoned factory or warehouse of some sort based on the condition of the room. He tested the strength of his restraints and found he could barely move his hands due to cut-off circulation. His feet were tied just as tightly.

He sighed in frustration and heard a blast of white noise come from behind him. He whipped his head around and was able to crane his neck enough to see a TV flicker to an image of a man wearing a creepy, yet familiar pig mask, and a black jumpsuit. Something was unsettlingly familiar about the wardrobe, but he just couldn't place it.

The man on the screen looked up into the camera and gave a small wave. "Hello, Gilbert Grissom." the perp said. Grissom froze, recognizing the voice changer. "The Jigsaw killer and his known accomplices may be dead, but the games are far from over, and we want to play a game. The lives of your graveyard shift coworkers are in peril. Some of your friends will depend on you to save them, but some will have to save themselves. Listen carefully, Mr. Grissom, if you want to save your friends. To save them, you must first save yourself. The key to your salvation is located in this room, but you better hurry. If you fail to locate the key in sixty seconds, this room will be sealed shut and everyone you care about will die. Let the game begin."

And with that, the screen returned to static. He tried again to free his hands, and a distinct 'click' was heard; his restraints falling away. Feeling blood rush back into his extremities, he looked at what had bound his hands and feet: some sort of wire attached to what appeared to be a computer chip. He soon gained enough stamina to stand, and as he did, a timer lit up on the door, counting down from sixty.

'Oh, god!' he thought, stepping into the middle of the room as he looked for a place the key could be hidden. 'Come on, Gilbert, think!' his mind pleaded as his eyes searched for answers. The room was devoid of any furniture aside from the TV, the TV stand, and the chair. He was down to thirty seconds when he noticed an envelope taped to the back of the chair. He tore it open and stared in shock at the contents: a note reading 'try again', and a picture of the long dead CSI, Holly Gribbs.

He tossed the note and envelope aside and spotted another envelope taped under the chair. He snatched it up and sighed in relief when a key fell into his hand. He stood and slid Holly's picture in his pocket while simultaneously running for the door. Never glancing at the timer, he shoved the key in the lock and turned it, freezing as he heard a loud buzzing. The door opened and he exhaled a breath he had been holding. He looked up at the timer, surprised to see that only three seconds had remained before the fates of him, and his friends would have been sealed, like the door.

He stepped out of the room and gazed down the long corridor ahead of him, which seemed to stretch on forever. The drone of flickering lights was clearly heard as he stepped down the hall. An arrow was spray-painted onto the floor, pointing down another hall. Now, Mr. Gil Grissom wasn't an idiot. He knew the suspect, or suspects, wanted him to go down this new hallway, and he knew that they knew he would think about ignoring the sign. However, they also knew that he wouldn't risk his friends' lives, so going against his instincts, he followed the arrow, knowing he was walking right where they wanted him.

And as soon as he could see what was waiting for him in the flickering-light-illuminated room, he knew he was right.

A/N: so, that was chapter one. Warning, there will be character deaths, because it wouldn't be a SAW story without death.