Mega was a gladiator in the pits, one of the best who won nearly every fight... Except for ones against Megatron.
Meanwhile, Gigatron was born on the second moon of Cybertron. Later he moved to the planet proper to try and become one of the first warframe mnemosurgeons under the tutelage of Trepan.
He always watched both Mega and Megatron in the booths, admiring both of them, especially Megatronâs writings, as a warframe who didnât want to fight. Donât get him wrong, he loves bloodshed, but he prefers to be a voyeur rather than a participant. He always paid for special meetings with both Mega and Megatron.
When the war broke out, Mega joined the Decepticons to get closer to Megatron while Gigatron joined the Decepticons because of the philosophy. Even though he didnât finish his training, Gigatron was important for the war efforts being at least familiar with mnemosurgery, all the while Mega could be labelled as just a skilful grunt.
One solar cycle, Megatron decided on a program that would inject chosen mecha with Ununtrium. Mega and Gigatron were both too physically weak for the process, but Megatron gave out the idea that they could be turned into a combiner. Finally shown a way to be one being in a more literal than metaphorical way, they agreed instantly, become a combiner.
And when Mega and Gigatron combine, they form-
âNO, ITâS OVERLORD!!!â
When Megaâs 50% sadism mixes with Gigatronâs 50% sadism, they form the 100% certified sadist Overlord!!
Everybody (Except Megatron, Shockwave, Rossum, and later on Tarn and Thunderhowl) thinks that Overlord is just one mech. One sadistic, full-of-himself mech that compliments and praises himself at any and all opportunities. In actuality, whenever Overlord compliments himself, its Mega and/or Gigatron praising each other. All the love for himself is love for the other.
Mega is obssessed with Megatron because of her defeats while Gigatron is obsessed with Megatron for her writings, making Overlord kind of confusing. He knows Megatronâs writings on the back of his servo like Tarn, but always talks about his desire to defeat then kill Megatron.
At first Megatron thought that having Gigatron, a relatively loyal mech, be one half of Overlord would make the combiner less Megatron-murder-hungry, but instead it just made a mech that wants to kill Megatron while also reciting her work, so Megatron asks Shockwave to put an Achilles virus on Gigatron specifically. Because of how dangerous it is to preform mnemosurgery on oneself and Megaâs denial to do anything that could risk Gigatronâs personality, they created a barrier to prevent Overlord from harming Megatron.
After Megatron left to chase after Optimus Prime on the Nemesis 40 years ago, Overlordâs been hanging around Tarn and Strika, fighting against Elita-1 and the rest of the Autobots that didnât leave on the Arc with Optimus.
