A bit hard to pitch (in less than 500 words, at least), Twilight Waltz is an original mecha RP that is set in a dark, sprawling (Midgar-like being the easiest comparison) city that is the center of civilization in a land trapped in an eternal winter. Ruled over by an administrative corporation that controls most of the infrastructure and resources, they use humanoid combat machines known as Harbinger
as the backbone of their army that controls the Northern Lands.
Harbinger are midsize mecha, essentially big enough to accommodate chest-cavity cockpits and small enough to maneuver through city streets and subway.
^^; And there's obviously a lot more to things, but it would be silly to copy and paste whatever info here. The game got started a little while ago, but it was essentially a short prologue that was played with a small group, and now things are first really about to get underway.