We've got a walking one, very reminiscent of the AT-AT from Star Wars, by Rat Dude. He calls it the BT-HIW. I bet HIW is an acronym for something
(looks at description)
Yup, it stands for heavy Invasion Walker. Woe to the poor Space pPlice who have to face these monsters
And we got a more traditional tank by Stephan Niehoff. He calls it the Scorpion II. Apparently it's a tank from Halo, but sine I do not play the game, I will just have to take the builder's word for it.
6 months ago