The Steam Man — Dark Horse Comics

Enormous steam-powered robots march across the Great Plains of the old American West, protecting the populace against invading aliens and monsters! The Steam Man and his operators seem to have their task well in hand, until a crazed and powerful vampire comes to town intent on bringing forth the apocalypse! Collects The Steam Man #1�"#5.
“With the heart of a western and the appeal of monster-extravaganzas, The Steam Man is a genuinely engaging read.” -- Villain Smash
“The Steam Man is an awesome comic. Good storyline, quality artwork, and the entertainment value is there.” -- Graphic Policy