[quote=@Jig] Excellent point; though, aesthetics and maybe history aside, my question is broadly the same - what is considered excessively powerful? While I'm not a warfare buff and don't know names of things, it's very much inspired by the monstrosity that Germany was trying to build that was considered technically stupid and impractical in the sense that nobody really knows how useful it would actually be. What I'm kinda hoping for is something that could legitimately scare off a ship that got too close - provided it works. But, as I ask - is that OP? Zeppelins, if I choose that line, would be contemporary inventions. Only the tank (which for all intents and purposes is one big-ass stationary cannon) would be pre-Cataclysmic. [/quote]Well, you can scare off warships with large anti-ship rockets for sure. In the 50s they were coming up as the new scary-scary thing. Soviets had anti-ship missiles that looked comically oversized on a ship. Unless you make the super tank utilize futuristic super armor along with other super technologies there's no way a tank can outright match a warship. Let me put it this way, battleships like the Iowa-class were so damn tough they could absorb literal hundreds of bombs and even from a battleship cannon they could take at least a few dozen before sinking for sure. That is because battleships are both big and heavily armored. Actually armor is almost meaningless next to the smart design choices they made in order to maximize survivability. Thus you could have nearly a hundred penetrating hits yet the battleship could be still seaworthy enough to return home. You might try mounting battleship ordinance on a huge tank but it won't scare away a decent warship. For starters artillery are far from accurate, especially on moving targets. Your cannons WILL miss a ton before scoring any hits. Second, warships by their size mount more ordinance than a tank. Lastly and most importantly warships are damn tough overall. Prior to the modern doctrines which just prefer not being hit the warships were massive sponges of firepower, especially battleships. Your super tank won't be able to replicate this since all the critical parts are squished into a much more compact package. Granted, a well-made big gun can each for 40-50km thus it could scare off anything but a battleship. And once a nation uses battleships you shouldn't rely on a single defense system to begin with. So if you wish to stick with the idea of super prototype tank then try something like the P1500 Monster built of titanium-aluminum alloys. That'd cut back on the weight of the vehicle by 40% so it would be closer to "just" 900 tons. Add a flexible suspension and wide multi-track system and you get a workable device. You can also make it nuclear powered if you want (though it might be not as feasible for you). Even without a reactor the vehicle should do a flat 40 km/h without much problems. The main issue would be the sheer size of the thing. That and it'd cost quite a fortune to make thus explaining why you own only one such vehicle. Alternatively you can opt for a pre-war find. How about an ancient railgun armed mammoth of a tank called BOLO? Its a sentient vehicle which lacks many of its original function but self-aware enough to prevent tampering to its in-depth design. It's made of composites which in turn make it rather light. Its main weapon is a powerful railgun with over 300 kilometers of range. Since railgun projectiles aren't that complex to build you can supply it with ammo (although less effective than the original). The rest is on the advanced ballistic computer of the BOLO which allows you to fire shots with much greater accuracy than otherwise possible (though still not perfect). This would effectively make the tank worse than contemporary missile systems while cheaper to maintain. The outer hull and propulsion of the tank required replacement thus they aren't OP. The only super advanced parts are the AI and the railgun, and you can touch neither. How does this sound?