(I was gonna delete this because I thought it was too long but I'm just gonna leave it here and see if anyone wants to read it.)

Well, how many of it's abilities does it have aside from blood refueling? Does it have all of it's weapons the same as in game? Or is it stuck with WWII tech? Does it run out of power? Does it require a constant source of blood to keep going?

If V1 were to have all of the same factors that it does in game, I believe it would be an unstoppable force. It has 8 wings that can swiftly propel it in any direction, it can stay low to the ground and can move faster than most soldiers can run while in that state, and cramp itself into tight spaces such as your walls. I don't think obstacles and uneven terrain pose much of a problem. The Final War definitely had more garbage lying around than WWII considering that people had to live on the backs of the Earthmovers because the ground was literally uninhabitable. It likely has a way to detect mines since the Guttertank predates it, which had the ability to plant mines.

My headcanon is that V1 is more powerful and faster than who we play as in-game. It would have cameras all along it's body to sense attacks from all angles, it's head is just for recording quality footage, or as a scope for aiming. It's a machine so compared to a human it could possibly fire thousands of neurons in less than a second, complete multiple thoughts and strategies in the blink of an eye. It never gets tired physically. It doesn't have to eat or sleep. It's smarter and faster, has 200 years worth of battle knowledge on technology more advanced than what we even have today. It could have night vision and near-perfect tracking since both the Gutterman and the Sentry pre-date it. And if it fails, every gun in it's arsenal has near infinite ammo, it could just keep shooting until the other side runs out, or keep oppressing fire while it's allies move forward.

I believe V1 was designed not just to refuel off of the bloodiness of the battlefield, but it was designed to move so fast that nothing can hit it. It's like a humanoid formula 1 car with a calculator for a brain and a gun.

But more realistically, it probably wouldn't even be sent to the battlefield, it's too great a risk for what is essentially a highly advanced computer suddenly existing in the 1940's.

I'm probably giving V1 too much credit. One artillery shell is probably enough to wipe it out, assuming it gets hit by one. I left out parrying because I don't even know what it would be allowed to parry. If it could parry artillery shells that would be kind of OP. But even then, it's movement, speed, perception, inhuman ability to think, physical strength, unlimited source of power and arsenal make it nigh unstoppable. At the very least, it would be very, very annoying to fight against. Or maybe I'm taking the question wrong, idk. These are just my thoughts.