Transformer
The race of Transformers, since their home world of Cybertron was destroyed, have come to inhabit your world. These robots of titanic proportions have many factions, squabbling over your world. The most prominent factions are the Autobots and the Decepticons, sworn enemies of each other and the main batalions in the combat for your world.
Transformer Traits
If you are a Transformer, you gain the following traits.
Ability Score Increase. Your Strength score increases by 3, your Constitution score by 3, and your Intelligence score by 3.
Age. Transformers can easily live for millions of years, as they do nor age like humans. It is possible for for them to get killed, but only in battle.
Size. Transformers average at about 23 feet tall, giving them a size of huge.
Speed. Your base walking speed is 120 feet.
Transformable. Choose a modern vehicle. As a bonus action, you can transform your body into that vehicle. If that vehicle can fly, you gain a flying speed as that vehicle.
Mechanical Body. Without wearing armor, your base armor class equals 14 + your Dexterity modifier.
Built in Weapon. This feature is optional. If you choose to have a built in weapon, you have a retractable weapon like a gun that you can retract as a bonus action.
Gargantuan Nature. Unless the weapon is to your size, weapons with the heavy or two-handed property lose the property to you.
Languages. You can speak, read, and write common and Cybertronian.
Subrace. The three most common types of Transformers are Autobots, Decepticons, and Maximals.
Autobot
The classic heroes, the Autobots, under command by Optimus Prime, have taken to protecting your home world, at whatever cost necessary. Your shape tends towards a classic robot, with a splash of color.
Alignment. You tend towards a good, somewhat chaotic alignment.
Teamwork. You gain advantage on attacks when working as a team.
Decepticon
Nemesis of the Autobots and ruled by Megatron, these Transformers will see to it that your home world is wiped out to make more Transformers. They have a metallic palette.
Alignment. You are purely evil.
Intimidating. You have proficiency with the Intimidation skill.
Maximal
These animal looking Transformers are strong and powerful. If you choose this subrace, you lack the Transformable trait.
Alignment. You have a good, somewhat neutral alignment.
Stronger Prototype. Your armor class equals 16 + your Dexterity modifier.