Ratte

逃吧，小胆小鬼！我是一辆能把你碾碎的巨型要塞坦克！！巨大的履带剧烈地翻滚着，巨大的轮组在向前推进履带时剧烈地抖动。两门280毫米54.5 SK C/34主炮缓缓地指向你。准备发射它那巨大的炮弹。

In reality Landkreuzer P1000 Ratte tank was cancelled in early 1943. The Main gun is 280mm 54.5 SK C/34 naval guns as a primary armament. The turret housing these guns would have been modified heavier cruiser emplacement. capable of 360-degree traverse.

The Anti aircraft guns - The Ratte's proposed Anti-aircraft defenses consisted of multiple systems

Eight 2cm Flak 38 guns, two 15mm MG 151/15 auto cannons, and multiple 20mm and 30mm AA gunsguns with some designs suggesting as many as 24 of each. (plus they are operated by Ratte.)

Back guns - There's one each top side turrets which is Panzerkampfwagen VII Maus turrets. their guns are the 128mm KwK 44 L/55 gun was a formidable weapon.

Second Armament - in addition to the 120mm main gun. the Maus turrets also featured a coaxial 75mm KwK 44 L/36.5 gun and a 7.92mm MG 34 machine gun. The 75mm gun had 100 roundsrounds, whilethe machine gun had 1,000 rounds. Plus they rotate in 360. (also operated by Ratte same for the Anti Aircraft guns.)