A/N: I tried this idea of a Halo and BBC Sherlock crossover because I had a craving for finding this idea but no results came up. My personal dub for this crossover is HaloLock.
I will try my hardest to update; Hitting a writing stump with crossover constantly.
Possible for some OOC moments as I'm following the Halo 4 storyline through each section of gameplay and cutscenes. Each level will be a new chapter. More Sherlock and Halo characters will be brought in later on in more chapters to come. Sherlock sometimes refer John to "Chief" but it won't happen too often for consistency's sake. I've adapted some of the dialogue so it wasn't a complete copy-and-paste from the website I've used for help. Source for Halo transcript: wiki/Dawn_(level)
Master Chief - John.
Cortana - Sherlock.
This: * is any audio transmissions.
Italics are Rampancy.
Please R&R. I have no Beta, all mistakes are my own.
Calculations - DAWN:
"Mayday, mayday. This is UNSC FFG dash Two Zero One Forward Unto Dawn, requesting immediate evacuation. Survivors aboard. Prioritization code Victor Zero Five dash Three dash Sierra One One Seven"
"This is UNSC AI serial number CTN Zero Four Five Two dash Nine Sherlock requesting immediate evacuation" Even the Great AI Sherlock grew tired of his own voice after hearing it for fours years, seven months, ten days, eighteen minutes and thirty-eight seconds precisely. It was driving him mad. He was driving himself to insanity.
Sighing he materialised into his avatar form, curled up in a ball, gasping as shards of the broken ship floats aimlessly under the mystery of rumbling on the ship. He stood tall creating his holographic screen. Desperately searching for anything to keep boredom at bay, he shakes, burdened with the secret fact of rampancy under his binary mask, visibly he looks scared, not of his death but losing John. Reaching a status report with five red circles outlining the hull breaches showed nothing he didn't already know. Next bringing up the cryostatis control page, one showing none other than John-117 Mjolnor armor. Sherlock pressed the simple and obvious command to reawaken after careful consideration of their problems, the status moved to "ACTIVE" coming up. Closing his eyes he turned towards John's cryotube. "Wake up, John. I need you"
John awoke groaning with clear uncertainty and discomfort, "Ungh..." Snapping back to reality instantly slammed his hands on the Cryochamber's glass. Sherlock almost flinched "John! Easy. You've been out for a while now" Seeming to calm the SPARTAN down John asked "Where are we?" John first instinct was always safety "We're still adrift aboard the Dawn" "Why did you wake me?" Was John's first instinct, "Hang on. Bringing your systems online" John's HUD lit up bright, "I've rewrote your suit's firmware while you were unconscious" Sherlock avoided the question "You've been busy then" "Didn't take long, found myself redoing it several times. Activating the ship's gravity generators. John watched still partially groggy as debris and crates dropped, the System Voice Over automatically spoke up *Partial System Restoration. Initializing System Diagnostics* "John, do look up. You'll need to pull the manual release for the Cryotube to open" Doing as such Sherlock waits kindly as John walks to the holotank still supporting his trusted AI. "Seems like old times" "Ready to get back to work?" "Though you never ask. The game is on"
Pulling Sherlock back into his helmet's neural interface, John swore there was a faint trace of heat coming from the usually cold chip but said nothing of it raising his MA5D Assault Rifle in defense and combat. "John. We've got intrusion alerts lighting up on multiple decks. Our best bet is to figure out who's boarding us is the observation deck - four floors up from us" "It could possibly be a rescue team" The ship shook violently for a moment "I wouldn't call that a daring rescue" John shifted through the hallways meeting a holo-table displaying the Forward Unto Dawn, he activated the three terminals in front of him *Weapons Systems Online* *Gravity Controls Online* *Ship Propulsion Online* leaving the system John-117 manuvered further down the corridors. "Sherlock, how long was I out?" "Four years, seven months and ten days" "Somebody should have found us by now" Entering a larger circular roon with a console displaying a replica of the Dawn's predicting drifted course appeared as if the ship was being dragged towards an unknown red icon. Suddenly a large mass of a orange energy wave scanned through the entire ship creating a loud, scratching noise, disrupting electronics bar Sherlock but he did fizzle for an eighth of a millisecond "What's that?" "A sensor scan of high intensity. It doesn't match any known pattern" "How close are we to an observation deck?" "Directly above us" Sherlock created a waypoint on John's HUD.
John left the room immediately leading to small room with an elevator "The doors are sealed tight" Cracking his neck to the right John - showing off - pried them open with his bare hands, slipping his gun on his back "Chief, be careful!" Successfully opening and stepping through the elevator doors, the change in depressurization causes several creates to knock John from his holding outside the elevator shaft - rudely interrupting Sherlock. John managed to grab hold of the side of the shaft avoiding the debris, and slowly climbed to reach the next level "Because some areas might have lost all pressure. I'm glad I rebooted your suit, but be mindful of shoulder, John" "Right" John pushed out adapting to his changing surroundings. After achieving a few ladders an explosion causes more debris to crash in their direction. Watch out!" Sherlock ordered, acting quickly John-117 leaps to the left "I hadn't realised the ship had deteriorated so badly" Sherlock scolded himself for not being thorough through the entire rest of the ship as John sidelines to another right then left avoiding more heavy debris managing to climb to the top of the shaft. Pulling and stepping up onto an opening a Sangheili weilding an Energy Sword appeared from the shadows, John blocked the sword strike following up with a right hook to it's jaw tossing it down the shaft, turning away from the edge the doors locked behind him. "I thought we had a truce with the Covenant" "Well, a lot can happen in four years. Doesn't matter, either way he probably wasn't alone. We need to be careful"
John followed his waypoint, entering the Observation Deck quietly. Another lone Sangheili is fiddling around with the console, John takes this opportunity to be swift and kill his enemy from behind by forcing it's knee to the ground and stabbing it in the chest, tossing it to the ground as Sherlock lights up red markers on John's HUD for the multiple Unggoy surrounding the area patrolling the lower deck notice their leader drop dead. John killed them with minimum bullets and with most accurate aim. Sherlock enjoys hearing the idiots and cowards beneath John die. That isn't a good sign, focussing Sherlock speaks up "That's the last of them. Find the override for the blast shields se we can see exactly what we're up against" Heading back for the control system John controls and activates the override, the shields began to open promptly "The good news is that these Covenant aren't outfitted like our standard military. It is possible we came across a rogue salvaging ship looking for supplies" Now that the blast shields are fully open revealing a Covenant fleet consisting of multiple CRS-Class Light Cruisers holding their positions in front of Dawn something else that Sherlock nor John knew about was in sight. Banshees flew near the deck windows and retreated back in the opposite direction "Or it's possible and more likely we've stumbled across and entire Covenant fleet" "Maybe they haven't recognised us yet" Just as those words left John's lips two Phantoms lowered towards the windows, it's boarding craft moving to interrogate the deck "One idea" The second Phantom joins on the other side of the deck. "Landing craft, flanking from both sides" The glass is breached, the deck loses considerable amount of pressure and oxygen. Covenant troops begin to drop in.*Warning. Atmosphere breach. Activating Emergency Barricades* "Sherlock. We need to get off this ship" "Bigger problems John; A cruiser is intercepting our course of action. Head for the elevator banks, now!" John followed the order. "Didn't the ship's sensors say we have our weapons systems online?" "Yes, well done for remembering but since the ship was torn in half we can't access the weapons system. We'll have to fire them manually from the outer hull meaning we're going to be on the enemies ground and line of fire"
Entering the elevator, lowering a few floors until reaching another hallway they were searching for the Covanent fought annoyingly against John-117 through narrow halls and blind spots, but always ending in John's victory "That's cruisers shields are lowered. Now, assuming they don't raise them back our missile is going to be a hell of a surprise" While continuing to encounter more Covenant resistance John spoke up "These Covenant seem more fanatical than the ones we fought before" Sherlock didn't answer starting to lose his concentration on hiding his secret so John spoke again "How far to our missile?" "Just about there" Sherlock updated the SPARTAN's HUD again. Approaching a larger room, spaced out further than most on this ship John fought his way through, with Sherlock's assistance of foe tags made his way to the airlock behind the outer hull. Sherlock now decided to talk "The auxiliary launch station should be on your left out from the airlocks" As Sherlock finished a pixilated blue distortion displayed itself on John's HUD "You'll have to prime the launch for ignition!" "Sherlock?" "It's nothing. Get to the launch station" Sherlock cringed in pain, he knew another slip-up could distract John enough to risk his best friend's survival if the AI couldn't focus on what was most important. The airlock doors opened revealing what mysterious thing the Dawn was heading towards. Sherlock shook off his glitch for a moment "Uh- How did I miss an orbiting Forerunner plant at this proximity?" "Take it one thing at a time" John-117 started striding towards the control system running into various troops of Sangheili, Kig-Yar and Unggoy Rangers. "John, find those missile controls" As instructed John forced his way killing all foes and activating the controls "Launch initiated. Good job" By the far side of the Dawn the missile prepped for launch however being inconvenient one of the four blast doors jammed. "Oh, great. Jammed in. Of course it won't fire until cleared. Get down there and solve this problem!" Avoiding the newest cavalry from the impending Phantom troops John reached the missile and kicked the blast door into releasing the missile.
"Brilliant! You did it. Now stay back" Watching the missle destroy the Covanent cruiser was satisfying for both SPARTAN and AI. Shattered remains drift across the Dawn. The planet casts a strange noise, once more the orance wave of energy is back, this time scanning only John, shielded his eyes through his visor changing in hues from the light difference "John?" "It wasn't the Covenant scanning us" In the centre of the planet a circular rift begins to open, emitting a bright baby blue light "So then, now can we worry about this giant metal planet ready to draw us in by the looks of it"
"It's using an accurate Gravity Well to force us inside to the surface!" Small, light objects start zipping away as if tugged severely by string "We've got to hurry, John. The second we cross the dome's event horizon it atmosphere will tear us apart" "The escape pods?" "Uh, AFT Vehicle Bay! Tagging it in to the closest airlock. Move!" John does make it in time avoiding all exiting debris. *Hull Integrity 30%* John continued to follow Sherlock's given pathway *Warning. System De-pressuriaztion* Reaching a new part of the hall John narrowly avoids the collapsing floorboards able to reach his wanted door. *Proceed Immediately To The Nearest Lifestation. Hull Integrity at 25%* John shimmied across the perimeter of the rooms as dying Unggoy attempted to flee and shoot but prevailed at neither. *Emergency Escape Pods Have Been Ejected In This Area* "All but one of our Gravoty Generators went dark on me" "Just keep me pointed towards the vehicle bay" Finding another room filled with dying and panicking Unggoy and Sangheili John blatently ignores them as the ship continues to collapse *Hull Integrity 15%* "We're almost there, keep moving!" *Hull Integrity 5%. All Personnel Evacuate Immediately* *Warning. Warning. Catastrophic De-Pressurization* John approached the vehicle bay, one door ripped put entirely. The room was dangerously de-compressed of air and oxygen, the room was agonisingly breaking or snapping apart.
"John!" Sherlock cried to his friend and John grasped at the breaking doorm after it snapped from the hinges the SPARTAN clinged onto the railings of the staircase "Hang on. I'll find us a way out!" The railing gave in before Sherlock could progress, John was now floating adrift with the massive amounts of debris and Covenant spaceships being dragged down by the planet's gravitation pull. Shoving each object out of the way John needed to keep them both safe "We're trapped in the Gravity Well" "Are you able to track the closest escape pods from th Dawn?" "Negative I- John, look out!" Pushing the debris away from both him and his AI John was caught off on his left by an expolding piece of Covanent Warship, just squeezing himself through the explosion drained his energy shield to bare minimum luckily his injured shoulder wasn't hit. Sherlock's "Look out!" was barely registered as a wall of debris smacked the SPARTAN unconscious to continue their unguided fall in and through all the darkness hoping only luck would pull them through.