The Ops are: Kaiserschlacht Conquer Hell Iron Walls Oil of Empires My preference is: Iron Walls, Kaiserschlacht, conquer hell, and oil of empires. Iron Walls: I love the idea of fighting uphill against a literal mountain and being forced to take 2 bunkers that are just killzones that give a glimpse of how storming the beach in WW2 must have been like. Kaiserschalcht: By far the two most realistic maps I've ever played in a war game. The fact that almost every building becomes demolished throughout the Op just adds to the realism. The trenches are close quarters and nitty gritty and its scary to climb out of them or risk getting your head blown off.