[I don't own the titans... I just play them on TV]

This is my first fan fiction and I suppose if it is chapter one if I decide to continue the story.

"Titans, GO!"

The massive robotic tripod turned away from the passenger filled bus it was about to smash. 'New targets acquired,' a mechanical voice droned as several weapons deployed from its main hull, 'activating new directive, destroy the Teen Titans.'

The team was already moving; Robin firing his grappling hook strait at the monstrous robot, Starfire sweeping in from one flank with Raven on the other, Beast Boy charging as a bull, Cyborg taking cover behind an overturned car and blasting his sonic cannon, and finally Terra flying strait up on a boulder.

"I'll keep him busy Robin," Cyborg shouted over the roar of his cannon. The stream of blue energy barely jostled the forty foot tall machine. Robins grapple hit home and he began close with the tripod.

'Targeting Cyborg, activating EMP canon.' a blue globe of energy erupted from one of the many weapons and screamed towards the half robot hero. "No!" Cyborg cried, his circuits burning out. The once mighty titan collapsed upon the wrecked car, his red eye dimmed and his blue lights turned grey.

"What is happening?" Asked Starfire, her attack momentarily paused to stare in wonder at her teammate's sudden defeat.

"This thing seems to know a lot about us." Robin said, almost to the tripod's elevation.

Starfire looked back at the tripod. "And we know nothing of it..."

'Targeting Beast Boy, activating quantum-' the droning was cut off as Beast Boy slammed into one of the machine's relatively slender, yet massive legs. The green changeling fell to one side, soundly knocked out. '...target neutralized.'

The mechanical voice identified Starfire as its next target and announced the weapon that would surly destroy her. "Not if I have anything to do with it," Robin vowed. The boy wonder's momentum flung him high above the robot monster as he deployed his collapsible staff.

'New target Robin, launching kinetic missile.' Flying through the air and unable to change his trajectory Robin's only choice was to shield himself with his weapon. The impact snapped the staff in two and sent Robin spinning towards the ground.

"Robin!" Starfire closed with her leader and friend to save him, but something was closing with her much faster. The tripod deftly struck her with one of its legs, with a grunt Starfire and the mass of metal slammed into a low-rise apartment building that soon collapsed around her.

By this point the passengers of the Jump City Transit Bus had fled the scene, giving Raven a good opportunity to use her telekinetic powers. The bus shimmered in her dark energy and rose above Raven as she prepared to throw it. "Azarath Metrion Zin-" The tripod's voice became louder, cutting off Raven's last word. 'Targeting Raven, beginning emotional disruption matrix.'
'Destroy them Raven,' it was a terrible mechanical parody of Trigon's voice 'the other Titans are finished, destroy them and embrace your darkness!'
The bus hovered over head as Raven summoned her response. "You've got to be kidding..."
The voice returned to normal, 'moving to plan B.' the tripod swiftly lurched forward smashing itself into the bus, sending it and Raven careening to the ground.

Terra stood on her stone in shock. She could hardly believe the thing before her was possible, let alone that it had just taken out her new teammates. Certainly she hadn't heard anything about it before...

'New target acquired, unknown.' The massive tripod droned 'Analyzing for weakness.'
The last standing Titan gathered herself. It was able to defeat the others immediately but for some reason it was having trouble deciding what to do with her. "Analyze this!" cried Terra. She focused her powers below the tripod and tore the already mangled street in two, creating a deep ditch. The tripod struggled to escape but columns of rock jetted into its sides and caused it to fall deeper.

'Leg damaged, reverse disabled' the tripod fell over completely into the ditch.

Terra brought her arms together and the split earth followed, crashing shut on the fallen machine.

Terra slowly lowered to the ground feeling heavily fatigued from such a massive use of power. She paused to look at the aftermath of the battle. This section of the city looked battered. Building and car debris scattered everywhere, wreckage of street lamps and garbage cans, car alarms were blaring... a fire burned nearby.

"What happened?" BB sat up, still dazed from his run in with the tripod. "We got thrashed..." answered Raven neutrally, her right arm cradling her left. "... until Terra saved us." continued Robin, still otherwise unmoving in the corvette he landed in.

Terra would have blushed but she was paying little attention to them. She racked her brain for anything about a giant tripod. No, this wasn't part of it... this was completely unexpected.

"But who would make such a thing?" Starfire emerged from the rubble grey with dust. Luckily everyone had cleared of the apartment before it collapsed. "Slade..." Robin got to his feet. "No, this couldn't have been Slade." The words slipped from Terra's lips before she could stop herself... thinking quickly she covered for it "uh... it tried to kill you, Robin." It seemed to be a good reason, after all when given the choice, Slade spared all the Titans rather then let Robin die.

Robin stared silently at Terra Star spoke up instead.

"... then who?"