Author's Note: If you have seen the Transformers G1 episode 'The Secret Of Omega Supreme' (if not it's available on Dailymotion), I got some inspiration from that for my own take on the betrayal between Omega and the Constructicons.

Chapter summary: Omega tells Ome about the day of the betrayal.

"Hello" Normal Talk.

"Hello" Talking through the bond.

"Hello" Com-link/Private Com-link.

"Hello" Thoughts/Flashback scene.

A few days later Ome was with her Sire in his office, she was currently sat on his desk as he had a look at a report on his datapad from a recent battle he hadn't been needed in, since she was older now she looked around his office properly, she saw the pictures on the wall on the right side of her Sire's office and flew over to have a look. She definitely recognised the pictures of her Sire with her Auntie and Uncles, they were either all together, or it was her Sire with one of them, either way he looked relatively happy in them. But there were two pictures that caught her optic, the first picture looked quite old but it showed a beautiful city that she had never seen before, it looked almost pristine and she knew that this picture must have been taken during the Golden Age, she did sometimes forget how old her Sire was until he would talk about the Golden Age, she wasn't too sure what city was in the picture since she only really knew Iacon as that was where her Sire's base was located. She looked over at her Sire "Sire? What's this city?" she asked, pointing to the picture.

Omega looked over, for a brief moment Ome could have sworn she saw some sadness on his face but was gone just as quick "That is...was Crystal City" he replied "I used to guard it back in the Golden Age" he went back to reading his report.

Ome nodded a little and then turned her attention to the second picture, she recognised her Sire straight away despite the fact that in the picture he had no scars, he had the Elite Guard Insignia on his chest rather than the Autobot Insignia, and she could tell by his smile and the look in his optics that he was much younger, like he had no worries of the war and actually looked genuinely happy, she then looked at the six mechs that were sat on her Sire's shoulders all doing different poses or pulling a funny face, she had never seen them before nor had she heard about them, which did puzzle her since she could tell that they looked to be friends with her Sire. She looked over at her Sire "Sire?" she said.

"Hm?" Omega responded.

"Who are the mechs in the picture with you?" Ome asked.

Omega didn't even need to ask her which picture she was referring to, he knew which one she had spotted, sometimes he questioned himself as to why he had kept that picture, but at the same time it was a fond but sad memory. He gave a sigh and looked over at his daughter "Those mechs were my friends before the war" he replied and got up, he walked over and took the picture off the wall "their names were Long Haul, Scrapper, Hook, Scavenger, Bonecrusher and Mixmaster" he pointed to each mech in the picture as he said their names, he still remembered their names after all this time.

Ome looked up at her Sire "What...what happened to them? Did they get killed in the war?" she asked.

"It would have been merciful if they were" Omega replied, some bitterness seeping into his voice.

Ome had never heard her Sire be bitter like this before, she was a little unnerved but she knew there was a story to be told "What did happen to them?" she asked.

Omega gave a sigh and put the picture back on the wall, he knew that his daughter would have asked eventually, the only ones that knew of that part of his past were his siblings, not even Ratchet knew, but his daughter was part of his family and he felt that she had a right to know. He sat down at his desk again "I'll tell you" he replied finally, part of him didn't want to revisit this particular memory, but he had to, it was a little easier to talk about but was still painful.

Ome flew over and sat on her Sire's desk, she looked up at him.

Omega took a deep breath and let it out slowly, he had a far off look "This was back in the Golden Age, there had been talks of a war starting and there had already been some attacks in the rougher areas of Cybertron" he began.

Flashback - Golden Age of Cybertron

Omega was doing his usual duty of guarding Crystal City, he loved the place and had seen many Cybertronians who either lived or worked in the city, though he was concerned for everyone's safety after hearing the rumors of a war starting and the attacks in the rougher areas of Cybertron, he had even spoken to his friends about it yesterday evening that he was concerned about it, but that didn't mean he wouldn't fulfill his duty to protect Cybertronian life. He came out of his thoughts when he heard hurried footsteps approaching and saw his friends hurrying over, he frowned "Is everything alright my friends?" he asked.

"Omega! Alpha needs your help, there was an attack in his sector!" Scavenger replied frantically.

Omega looked concerned, worried for his younger brother, but he knew that if Alpha needed help he would have contacted him "If Alpha needed help, he would have contacted me" he replied.

"Yes but this attack was sudden" Hook replied.

"And he didn't have time to contact you, we were working nearby when he told us to come and get you" Mixmaster added.

"He gave us cover so we could get here in one piece" Bonecrusher said.

"He could be outnumbered Omega, you must go and help him!" Scrapper added, sounding panicked.

Omega knew that if another Autobot Guardian needed help, he could leave his post to go and help them without the need of waiting for orders from Ultra Magnus, who the leader of the Elite Guard, and he saw no reason to disbelieve his friends, and he feared for Alpha's safety, he knew Alpha's sector was the next city over but could easily run there. He nodded "I'm on my way" he said to his friends before he left his post at Crystal City, he made sure to take a route that was less populated so he wouldn't end up trampling over any smaller buildings in his haste to get to Alpha, he spotted said Autobot Guardian walking along on what looked like a patrol "Alpha!"

Alpha startled slightly and looked over at his older brother who looked frantic "Omega?" he questioned.

"Are you alright?!" Omega asked as he put his hands on his brother's forearms.

Alpha looked confused "Yes I'm fine Omega, I'm just doing a patrol" he replied.

"What? B-But...there's an attack in your sector and you need help!" Omega replied.

"There's no attack in my sector, and if I did need help I would have sent out a comm to you Beta and Gamma" Alpha replied.

"But...they said it was so sudden that you had no time to contact me, so you sent them to come get me and gave them cover so they could" Omega protested.

"Who did I send to get you?" Alpha asked.

"The Constructicons! They were working nearby when you sent them to come get me!" Omega replied, looking irritated that his younger brother was being so clueless.

Alpha stared at his older brother "Omega...I haven't seen the Constructicons at all, and there's nowhere round my sector that's due to be constructed or knocked down" he replied.

Omega could see his younger brother was telling the truth and frowned as he let go of his forearms "Then...then why would they...? I... I have to get back to Crystal City" he said before he ran off.

"Omega wait!" Alpha called.

Omega heard him but didn't stop as he ran back to Crystal City, why would his friends lie to him? It made no sense! Then he came to a stop and froze at what he saw, Crystal City was being destroyed by a huge green and purple mech who looked shorter than Omega by at least 10 feet, Omega vaguely heard Alpha approaching but was in too much of a shock to acknowledge him.

The large mech turned after stamping on an already destroyed building, then he seemed to separate and there were the Constructicons.

"The Constructicons?!" Alpha exclaimed.

"Why...Why did you destroy Crystal City?!" Omega asked as he got over his shock.

"It was necessary" Long Haul replied simply.

"Lord Megatron ordered it" Scavenger added.

"Megatron…? You're Decepticons?!" Omega exclaimed, he had heard the rumors about the Decepticons, that they had been behind the attacks.

"Isn't it obvious?" Bonecrusher teased, but it wasn't in his usual friendly tone that he always used with Omega, it was in an almost taunting tone.

Omega looked devastated, his friends, his only friends had betrayed him, he had given them his friendship, his respect when no one else had, and this was how they repaid him? "Why? Why would you do this? You were my friends...I stood up for you...I-I respected you when no one else did!" he said.

"We both respected you!" Alpha added since he had been introduced to the Constructicons when he was new to being an Autobot Guardian.

"I'm sorry Omega, but it just wasn't enough, now that we're a combiner and form Devastator, we will get the respect we deserve!" Mixmaster replied before he and the other Constructicons transformed into their alt modes and drove away.

Omega could only stare as he watched the mechs he had considered friends drive away, then he looked to what was left of Crystal City, barely anything was left standing. He had failed...

Alpha shook his helm in disbelief, then he startled slightly when he saw his older brother fall to his knees trembling, he rushed forward and knelt beside him, he held him close "I'm...I'm so sorry Omega" he whispered as his older brother sobbed.

Omega clung to his younger brother like a lifeline "I failed...I let them do this...I should have seen through their lies" he sobbed.

"You couldn't have known Omega, no one could have predicted this, this isn't your fault" Alpha tried to console his older brother.

Omega sniffed and lifted his face shield to wipe his optics, he lowered his face shield again and he put his hands on the ground, he closed his optics a moment before he clenched his jaw and opened his optics "I was gullible" he said.

Alpha was a little thrown off by the instant change in his older brother "Omega..."

Omega stood up "I told them so much about my duty as an Autobot Guardian, about how we can help another Autobot Guardian without orders" he continued "they exploited that to make me believe them, they knew how much you, Beta and Gamma meant to me so they used you as an example in their lie"

Alpha stood up as well "But Omega, they were your friends, how was you supposed to know they'd pull something like this?" he replied, he was unnerved by this new personality from his brother, it was so sudden.

"As I said, I was gullible" Omega replied and looked to his younger brother "but not anymore" he looked to the remains of Crystal City "I will never be that gullible again"

End Flashback

"Primus..." Ome murmured, looking shocked, it really explained why her Sire didn't look as happy in the pictures after Crystal City, it wasn't just because of the war but because he still had the pain of the betrayal weighing him down.

Omega nodded and looked to the side "I haven't seen them since that time.…they took our friendship and threw it back in my face" he said quietly and tried to stop the tears that were starting to escape his optics but it was futile "they could have chose to become Autobots...t-they didn't have to betray me..."

Ome had never seen her Sire cry before, he was always so strong for everyone, but she didn't think it a weakness, it showed that even the strongest of mechs needed comfort. She flew up onto her Sire's right shoulder and snuggled up to his neck, she sent comfort to him over the bond "It was never your fault Sire" she said quietly "they chose to join the Decepticons, if they valued your friendship as much as you did they wouldn't have even agreed to join the Decepticons, it's their loss"

Omega lifted his face shield to wipe his optics before lowering it again, he gently cupped his hand round his daughter, no words were needed, it was clear that he appreciated what she said, and it made things a just little better.