Ehrgeiz was aired on TV Tokyo as a late-night anime, but not because of it's content. The reason it was late-night may be because it was less expensive than releasing it as an OVA.
The first mecha anime to be premiered on late-night.
Ehrgeiz did get an English dub for the first two episodes. However, since sales for the dubbed tape were low, as were overall sales of the show, Bandai did not dub any more episodes afterwards, and did not bring the series over to DVD.
Due to a low animation budget, the robots slide around rather than walk when on the ground.