Gearhead 1

GearHead is a roguelike with a mecha-theme, which immediately puts it high on my interest list. :) The pretty pixel-graphics helps a lot too. It seems to combine roguelike elements with more strategy-oriented game like Titans of Steel. There also seems to be a lot of story written for it. If it sounds interesting, it just had a new release after a nine year paus, which you can find here.

The isometric pixel-graphics feel nice and isn't something you see often.