T-28 might have been a monster on the battlefield, had it seen production.
Read an article that said it was so heavy that the outrigger treads had to be fitted to support it's weight, and fitting those made it too wide to fit across many of the bridges in Europe.
Can you imagine what it would've looked like to see four or five of those behemoths crawling across a meadow towards you? The business end of those cannon would have looked like battleship cannon when they were pointed at you in anger.........